My wife and I are building a house and have been living in our 31UL since we purchased it a month ago. We have actually only driven it a couple of hundred miles but have slept in it every night. Here are a few of our observations:
1. The instant on water heater system sucks! Long run up to have hot water that is mostly lukewarm. This is not a great time of year for cold showers!
We actually are planning on using the instant hot water system in our new home but we may be rethinking that.
2. Fit and finish are holding up well.
3. Jury is still out on the mattress.
4. The fuse box could be located better. Being on hands and knees holding a flashlight to check fuses is not my idea of fun.
5. We are new to the RV world so we do not have any comparison on driveability but windy days are exciting.
6. We purchased the 31UL because we liked the layout and after thirty days we still like the layout.
Overall we are very happy with our purchase.