Hi Milkybar, Forest Gump on here is the mind of the Adria world, he pops in now again so hope he will give more info than I can
But--
I have a Fleetwood made by Adria when they took over for a short period before they dropped the Fleetwood Brand, mine is the same layout as the 642UP and we are really pleased with it, the Adria quality is in my opinion very good, we have had the van a year now, laid up over winter got it ready today for the off in two weeks checked everything and all working and ready to go, except a window catch we I knew about last year and forgot to do any thing about it!
Really good quality, comfortable, reliable and with the polyester sides warmer, and they dont dent as easily as other makes.
Hope this helps
Kev