We owned a Fleetwood Expedition for 5 years. Never had a roof leak issue, nor ever heard of it. Th were the normal issues ( not a lot) the first year, but it was trouble free after that.
Our next couch in my mind was going going to be a Allegro bus. So last year we started looking. We looked at 2 Tiffins and to say we were really disapointed in the fit and finish would be a understatement. There were paint issues, fit and finish and broken items we noticed. The door rail going up the stairs inside the coach came apart when I grabbed it to go up the stairs.
Looked at Winnebago too and wasn't impressed. We ended up going into the coach we have now a Discovery LXE 44H - with a tag axle. It was a instant hit. And the fit and finish was perfect. It sits on the same frame as the American Coach line. Had a few problems that have been fixed over the year, nothing major.
Saved a lot of money over the Tiffin. And no roof leaks. No regrets