We have the Atwood in our 22RBPR and other than something shifting in the freezer and popping the door open, we did not have one problem with it on our first voyage of 1800 miles.
I had it running in the driveway, for a couple of weeks, prior to leaving and had it switching from gas to electric and back, both shore power and on my Champion generator.
On the trip it switched flawlessly as well, with no manual intervention from me.
I was kind of worried, after reading this thread, but it worked great
-Brian