We own an age indeterminate Phoenix. The sticker with all of that info has faded past legibility. It has had it's issues, but they've all been surmountable. Currently weighing whether to go 2 way fridge and dump the ineffective 3way (yes, I've cleaned the burner). Ours has some insulation between the inner and outer fabric skins of the soft top. I've no idea if that is normal or not.
When I called Phoenix they weren't very interested in helping me. When I talked to them at Expo '14 they were willing to talk to me, but weren't much help.
Faced with building one ourselves vs. buying a Phoenix the decision was easy.
So far the only roof leaks have been from tired vent sealant and the stupid thru-bolted hard mount bolts that I thought I could actually employ in holding something on the roof. I know better now, those will be replaced with sex bolts (to plug the holes) and sealed with 3M 5200.