When looking at used mid range Diesel Pushers about 6 months ago, there was only one brand of Diesel Pusher I would not consider - Tiffin.
The reason I would not consider a Tiffin is due to the Roof Rails, Fiberglass sidewall problems, slide out floor rot, storage compartment floor rot, Paint Blisters, etc.
I have no doubt that Tiffin would fix these issues, but I simply do not have time to be going to a factory in Alabama all the time for things that should have been obvious at the time of manufacture (Wood Rot on surfaces that get wet)
My line of thinking was I could buy a motorhome, then come on RV forms and brag about the legendary service received at the Tiffin factory on major RV service, or I could just buy any one of the number of other RV's that have no known defects and go on vacation.
When it comes down to it, it's your time, your money, and your patience level.