Had a 2002 Springdale, had a few issues with it biggest being that the rear slide shifted and needed adjustment. Dealer argued that they weren't supposed to, a month later I brought it back with the slide so far out of whack it had torn the weatherstripping off. 12 more years of ownership and no serious issues. One set of tires installed in 2009.
Now my 2014 Sierra. Got a short list going, the flashing on the couch slide has a small buckle, the couch slide seems to be hanging up at the bottom when I pull it in. Still functional and is likely just me. Eight nights out, probably 1,500 miles so far, the list isn't worth bothering with yet. This winter I'll take it back and let them have it awhile to fix things up if I don't get froggy and just do it myself.
Now-2014 Sierra 346RETS 5er BUB
Then-2002 Keystone Springdale 286RLDS TT
Nights camped in 2014-28, 2015-127, 2016-10