I like my 2012 Fuzion, but would like to know any specific things to watch out for, first 5er myself. Only issues I've had so far are difficulty in jacking it to check the brakes since it's so tall, and the dexter axles tell you to not jack on the axle tube. Brakes were fine BTW, it was the pile of crap Dodge ITBM/factory brake controller that was the issue.
The Fuzion doesn't seem to have much insulation -- it definitely needs the second/option AC unit for the size... the one unit really struggled to cool off and keep the rig cool when it was over 90F outside. Despite having the "blizzard" package it burned through two full tanks of propane (w/ heat set at 60F) in less than 7 days while being left sitting in the driveway. Long story short, took it out to go visit family, came home, was sick, decided to wait to (re)winterize... . it ran out of propane and froze. Looks like I might get off easy with only the toilet needing either some new O rings or MAYBE a whole flush valve, and the shower. No leaks from the pump and pipes in the unit... just those two fixtures, unless they're extremely slow leaks. Totally my fault for not checking on the thing and turning on the electric heater as a backup since it was plugged into a (20A) shore power.
I do wonder about the long term of the (I assume) Lippert frame after reading a bit more about them. The new 2011/2012 Fuzions are built with an aluminum frame structure, well, according to their videos, not that I've torn into a wall to look. Starting to worry I should've! :/ This thread goes pretty far back in time though and I haven't read all of it yet... trying to now though!