Grab a frosty drink and a snack, cause this will be a looooooong one. Kinda use this long list to understand what one "might" encounter or look and plan for as an owner of these rigs. YMMV.
Congratulations on your purchase, despite what I'm about to say, we still love our 2025 Micro Mini 2108TB and in our pre-purchase research, we found similar general issues with every brand. Take what I say as a single data point, not evidence of a system wide problem, although as you'll see below, I've found enough issues, it's hard to chalk it up to one bad worker or a quick job on a Friday before a holiday. Also be aware that in spite of the many small problems we've had with our trailer, we still really like it. The fact I can make most repairs myself, has really helped. I can't imagine what it would be like if I didn't have the skills I have. In every rig I've owned, I've carried some basic repair items, tapes, glues, wire connectors, zip ties, assorted screws and a basic all purpose toolkit. Nothing heavy duty or expensive, just a good variety in a handy case. Also keep in mind forums like this provide a biased view because this is where people come with their problems. There's literally millions of rigs on the road, so it's impossible to get an objective view of how good they really are. Happy people rarely complain.
It's my opinion, that these small trailers "suffer" from several market forces. One is the very hot trend toward small trailers that can be towed by a wider variety of vehicles. This means the smaller trailers are built to weight, as well as price point. Only way to make a trailer lighter, is to use lighter materials, which translates into light duty materials, so many things are engineered to be just barely as "strong" as they need be.
Because the market for these things is hot, and demand high, there's pressure on the factories to crank out as many units as possible. From what I've encountered tinkering with, and having to repair on our 2025 Micro-Mini 2108TB, Winnebego isn't using skilled or well trained labor to assemble these rigs even when it comes to critical things like electrical. I've mentioned in other threads, every single wire going into every breaker, including the 30 amp feed wire into the breaker box, was improperly stripped, the screws tightening down on the insulation. Proper wire stripping is something any apprentice electrician would learn how to do properly early in their training. The breaker box would have failed inspection - period. Both vent fans have small junction boxes, where in my trailer, the connections were made OUTSIDE the box, with the wires merely passing through the box, and the box holes were bare sheet metal. Another inspection failure. Uhhggg.
Regarding construction, in general, I've found where 6 screws would be adequate, the factory used three. I've found examples of a nickel being saved here, and a dime saved there. People talk of COVID era RVs being poorly made and slapped together, but I suspect, things really haven't improved much, if any, since then. Labor is expensive, and good labor more so and good skilled labor???
Note: that the drawer fronts and cabinet doors are made of a low pressure, "Masonite" like material with a thin plastic vernier over what I suspect is a foam core. This means screws like the ones for the magnet catch plates, and hinges can loosen and strip easily. I've had quite a few pull loose just from opening the doors. In places, a very thin plastic sheet is used over this material for the "wood-look." Ours has started to peel in places in the bathroom as it seems like little adhesive was used, and I suspect it was low VOC, water based, adhesive which is not very moisture resistant. And yes, we open the vent and use the exhaust fan after showering, and we live in a very dry climate overall.
We've had the large pot and pan drawer track support rip out of the underside of the countertop in the back, collapsing the drawer a few months after purchase. The way the rear track support was constructed, a thin frame the back of the drawer hangs from, was attached to the underside of the countertop, which is 1/8" luan door skin, on which the solid surface countertop sits. The screw heads literally pulled through the thin plywood as all the weight of rear of the loaded drawer HANGS from the soft 1/8" plywood. Nothing was used to support it from below, and only the thinnest, speck of glue was used before screwing it together. Unable to access the countertop underlayment, I used liberal glue at the top, and built a frame that extends to the floor to take the weight using about $2 worth of wood furring strip. No problem since. Like I said, a nickel saved here, a dime there....
Speaking of taking the weight... The 12v refrigerator in our rig has a fairly solid interior box, but the door plastic that has the tabs that hold the door shelves in place is very thin and the tabs holding the larger bottom door shelf snapped off while traveling - a nice surprise when we opened the refrigerator door at our destination. Not even sure the plastic is any thicker than a milk jug. Only way to fix it was a replacement door, just out of warranty, which would be made out of the same thin weak, material. So a few strips of Eternabond tape holds the lower door shelf in place. I've always carried a small roll just in case something cuts or pierces the roof. Not an elegant solution, but one that's very, very strong, and since the tape is white, isn't that noticeable.
Speaking of plastic.... In the first year of ownership ALL of the vinyl screw covering on the exterior seams of the trailer, have become brittle, splitting down the middle and coming loose. I saw two big loops at the front flapping in the wind in my side mirrors traveling down the road this past fall. Pulled over and cut ot loose. Bought a roll of 100 feet and have replaced them all. Sure the Arizona sun is harsh, but failing in less than a year?
On our first long trip, one of the cross members of one of the twin beds broke in half, and the bed platform is again, made of 1/8" luan plywood. Whoever built the bedframe used a piece of 1x2 with a knot large enough to nearly span the thickness of the board, placed knot side down, a piece of wood that should have ended up in the scrap bin instead of the trailer. It was on the road, so I sistered a new piece of "good" 1x2 with glues and screws to the broken piece after pushing it back up straight with a scrap of 1x2 which I removed after the glue dried. FYI, thank goodness I'm a wee lad so could fit inside the passthrough to fix the bed, but it was easy in, and awkward squirming out. Phew!
I've had the black valve jam open, and thankfully was able to coax it back closed, and with care, hasn't jammed again. I carry an external 4" valve just in case.
At every floor underlayment joint, there's a squeak when you walk. Non tongue and groove panels should never be placed tightly together, a tiny gap of around 1/32" prevents squeaking. Others who've had the problem have pulled down the coroplast belly cover and found very few screws holding the flooring to the frame, they add more to solve the problem.
Speaking of pulling down the coroplast.... Apparently in earlier years Winnebego used light weight straps to hold the holding tanks in place, and these could break causing a tank to drop. Some say this was improved in the last few years. Haven't check mine, but this winter, it's on the list.
Many also report, myself included, that the thin shower pan is poorly supported and flexes, especially near the drain which can cause leaks. Besides ours leaking along the retractable door, from a lousy caulk job from the start, I did what many other have, and made blocking which I then slid through the access panel to support the pan on the drain side, and it's been fine since.
Speaking of drains.... We stopped at a campground only to find water oozing out from under the kitchen cabinets. A quick look under the sink revealed the J trap had fallen down. NOTHING was supporting the trap and the long almost horizontal pipe it connected to, so the bouncing shook the trap lose and the plastic compression washed was so stiff, it wouldn't tighten around the sink pipe. A replacement from the hardware store, and a strap to support the pipe like it should have been from the factory, and it's never happened again.
Speaking of lose pipe fittings.... It was mentioned somewhere on this forum, when you take delivery of your rig, open up the plumbing access panels and check all fittings to make sure they are snug. Most of mine were not, which would have led to leaks later on. This includes the shower drain nut.
I'm sure there's other things I simply don't remember. My wife and I joke as we prepare for each trip: "Will THIS be the trip where I won't need to make a repair, however small???"
Again, we like this trailer, and chose it for some of the materials used that DO seem to be of good quality. Azdel siding was a must, as was a walkable roof. Nice power leveling jacks, solid plastic countertops vs low pressure laminate. An efficient 12v refrigerator, a nice and attractive layout, good lighting, enclosed and heated tanks, and enclosed underbelly which makes it rodent resistant, a decent hitch and bumper. Tandem wheels for greater straight line stability. The TV has a surprisingly good picture. AND.... the trailer is light enough to tow with my 2021 GMC Canyon with a V6. Yep there's that built to weight gotcha. I figure that despite being in my early 70s, I can continue to handle little things that break as long as the rig overall hangs together. Thank goodness for being retired from facility maintenance. I made a living fixing things, so while my list looks like the trailer from ****, and it HAS been frustrating at times, we still have a lot of fun using it. A long time ago on another RV forum someone put it very well. If you RV you better be handy, or good with a checkbook.
Another thing is America's roads. Not terribly far from where we live, is the army testing grounds where vehicles including tanks, and their crews are put to the test on some rough obstacle courses in the desert. I could save the army a lot of money by simply giving them a list of American roads and highways that would beat the snot out of their machines. These lousy roads no doubt contributed to some of the failures I've experienced, however, weak materials and poor construction techniques is the main cause. These are made to go down the road, so the road shouldn't cause them to fall apart.
One thing with buying used, is a greater chance, many of the bugs were worked out by the previous owner. It'll sure be the case when we sell ours. ;^)
Good luck with your choice. They ARE fun trailers.