Not bad, although I wonder why they had to drop the tank. It looked like that valve was quite accessible in place. But maybe it had something to do with burning off the propane.
I am also impressed that an RV service place had the equipment and skills to remove the tank, flare off the propane and replace the valve. Typically only propane service places have this equipment.
I didn't ask but I believe they had to remove the tank first because the valve is nearly impossible to break lose. They need a much longer leverage tool (5-6 foot) to break the valve's lock tite...
A little heat from a torch would soften Locktite, but I guess you don't want to use that on a propane tank ;-). Back in my younger and foolish days I might have chanced it, not today!