I have 2 100W Global Solar flat panels on my Phoenix aluminum roof, 3 years old. Am very happy with them. The surface is quite durable through many of the rough bushy/treed back roads I've been on. No sign of lifting off. Some scratches but I can't find any measurable impact on amps generated. Only downside seems to be that the edges are peeling up a bit, allowing water to seep into the plastic border area. I've layed down some aluminum tape to help seal that, but no damage yet to the silicon generating areas. The wires and junctions are fine too. Vast majority of days are in the Western US sun, I'm sure the panels get very hot, but plenty of power for my needs.
Until now these panels were not available retail (that I could find), only thru dealers/manufacturers.
Thanks for the input, can you post a pic?