We had a 2010 Denali rear kitchen and liked it very much, except. After owning it for about 8 months, the floor developed a noticeable hump or warping. We took it to a local dealer and they had to take a bunch of pictures for the manufacturer to determine how to fix the problem. Their solution was to cut the vinyl flooring at the edges of the furniture and pull it off the bad area. They then cut a square out of the floor and replaced that area. When that was done they put the old vinyl back, sealing the edges. They also cut an access hole in the underbelly and then taped it back in place.
When I got it back home, I started noticing bumps in the floor from where they neglected to sweep the area around the repair and small particles were trapped under the vinyl.
I took the trailer back and told them this was not going to fly with me (the tape was now dragging the ground from the underbelly). The dealer eventually took up the old vinyl and replaced with new and replaced part of the underbelly. I also had a problem with the axles not lining up, but that's another story.
I hope that is true about new owners.