20 years with the same Forest River Surveyor...
The only "issue" we've had with regarding build quality was the U-shaped dinette table, that drops to make a bed, was not sturdy - so I added a folding leg. And I added a couple shelves in the clothes "hanging" closet.
That's it.
Now we have age issues, such as soft floor and some bubbling / delaminating, but I call those age and use issues, not due to construction - and the camper is fully functional.
We are looking to buy a new one, hopefully next year. We can only hope the quality is as good as the one we have had!