Gulf Stream Vintage Cruiser fiberglass roof

I've been looking at a ton of TT's and am becoming more convinced I would like to get an Azdel onboard with aluminium cage TT. Gulf Stream has several brands. The Vista cruiser and the Vintage Cruiser being 2. They have a continuous fiberglass panel that goes from the bottom of the front cap all the way over the roof and down the back wall to the bottom. Any thoughts about a fiberglass roof as opposed to a rubber roof or whatever they're calling it these days? (DPM comes to mind) Does anyone have one and what do you think about it? I am wondering about the retro style and how will that stand the march of time as to desirability 10 years from now.