We’ve had ours for about 17-18 months now ... love it! Bought the electric freeze kit to be safe (that something you run if ambient temps are below freezing and your coach is occupied and not winterized).
https://shop.truma.net/products/aqua...antifreeze-kit
I think I paid less than that, so you might want to shop around a bit.
BTW, related to just normal usage, if you simply switch on the heater when you need it, then turn it off when you’re done, it is amazing how little it consumes propane. If you leave it on, particularly in the recirculating mode, propane usage will go up, of course.