We had our Norcold replaced 18 months ago in Red Bay in our 2007 Phaeton. There were two models from Whirlpool that could be used depending on whether the frig was on the slide or on the wall.
It works perfectly, we do not dry camp and it will hold the cold while we drive. I have installed a pure sine wave inverter with two batteries for the future.
For us it was a good move.