I have the 2008 version of that FW. We had a ton of problems during the warranty period. Cracked shower stall, stripped gears on the slide out which lead to the slide hitting the entertainment center. Had to replace the microwave which really wasn't Keystone's issue. It spent the first nine weeks we had it in the shop.
But with that said, once we got through all the initial build problems, it's been pretty reliable. Our landing gear did fail last year, but we've replaced it with no further issue.
Other than that, the only other issues we've had are sun damage to decals, awning and plastic parts due to our intense Arizona sun.