I had one of these with the swingaway option. It was perfect for my class B, and I let it go when I sold it a couple of years ago. Model 59109, purchased in Michigan and installed by the place I bought it. I could have done it myself, there are some install videos on the web for them. The company (Rola) is headquartered in MI, as well.
It worked well, had two locking points, a 4 pin light connector for my class IV hitch connector, a low point water drain, and seemed reasonably watertight driving in the rain, but it wasn't rated as waterproof. It sat just low enough that it didn't conceal the rear license plate on my van, so I didn't need the kit that lets you mount the rear plate on the back of the carrier. You could release the 4 point latching system, and remove the cargo box, if you just needed the tray portion. It traveled to Alaska with us, and carried all sorts of odds and ends including spare fuel and some other spare fluids.
I would recommend it. If they still make it??? I think they do.