This is our second season in ours and so far, no errors/faults from the factory.
However, the A/C doesn't seem to cut it on days above 82 degrees. I think mostly from the skylight-why they insist on these I don't understand. I have fashioned a sunblock made from a floor rug with velcro strips on 8 areas around the edges and stuck to the frame of the skylight. We were looking for anything as a quick stopgap solution and found a cheap little rug in the exact colors that matched our interior. This has seemed to make some difference. The A/C runs from breakfast until 10:30 pm and then it will maintain. When it's above 90 degrees it's not worth going-even here in NE Iowa!
Now, I don't want to give the impression that we're unhappy overall, we love it! I've added a few mods: "puck" lights in the linen closet; shower rod that is 3 piece and will expand the area in the shower so that a 6 foot man can shower comfortably. Probably more I've forgotten too.
The outside galley has been a blessing as the kids can get into the fridge outside with having to come in and let the cold air out
I'm also going to try that satellite/cable wiring mod I've found on this forum.
Winterizing was interesting as the water heater instructions are lacking but thru trial and error I've marked a valve or 2 so that I know which to open/close for winter/spring.
Overall we're very happy and our grand kids love it too!