When ours was brand new we had recurring leaks in the plumbing. The dealer just kept tightening the connections. I finally made them take the entire joints apart and redo the connections from scratch (way up behind cabinets). That fixed it.
Replaced a power converter. Cabinet hardware needs continual retightening or replace the wood screws. That is not a big deal. Checking them is part of the seasonal maintenance.
The sewer hose storage in the bumper was not usuable, welded too close to frame members to access the end cap. Added a separate sewer hose carrier under the rig.
Replaced a couple running lights. Added a couple exterior area lights. Added several shelves inside. This week moved the cell phone booster to a new location. All in all, no major complaints. We're happy with the rig.