My roof flew off on a major highway in Dallas...it was not cool. I was very lucky that it did not hit another car. This problem affects all Vettes with a solid roof panel, Z06 or not. They have fixed the problem for the new cars but it is very embarrassing to have the roof fly off of your new $80k car...actually it *****!!
What really made me mad is that it took GM nearly six weeks to get a replacement roof to my dealer. They wanted to re-glue the orginal at first (after painting it again) but I said no.
This was the nail in the coffin for me and my Z06. Too much BS to own the car and too many service problems (brake problems and a delivery disaster). I loved it when it ran, but after the roof fiasco, I had enough of GM and sold the car. Thus my new 06 Viper Coupe...lovin every day since!