Generally, I don't think anyone has had trouble getting reimbursed for repairs. I think how it's handled depends on the problem and how the owner prefers to deal with it. For example, the buttons on my MaxxAir fan stopped working on our last trip, and I asked Jason if they'd mind just shipping me the circuit board to swap out myself, since I didn't want to bother driving to Hohenwald or dealing with a service center for something that to me was easy to do. He said fine and I had the part in two days along with a box and prepaid label to ship the old one back.
We also had a situation on our first trip where our fridge went out and I didn't feel comfortable pulling it out to diagnose, so Oliver reimbursed me taking it to a repair ship where we were.
I'd say that the biggest issue in dealing with emergencies is in getting a prompt response. Sometimes it's great, and sometimes everyone is busy and you don't hear back. Or it's the weekend and all you can do is leave a message. But my impression is that things have gotten a bit more chill at the plant over the past 6 months and people aren't as overloaded as they were when we got our trailer. I also get the impression from the forums that overall initial quality has improved - at least I haven't noticed anyone complaining about issues like there was with the 200's.