How much does it cost to do this?
http://homepage.mac.com/retro_nb/gracesunroof.html

any disadvantages to these?

 

I think they look cool, and I would love a sunroof that big....BUT....I have a friend that installed these a couple of years ago and even had one on his EG hatch- he told me he never met a sliding rag that didn't leak-maybe not right away, but it will leak. Those are his words and experience I am just telling you what I have heard. He regrets doing it to his. I am sure workmanship counts for alot but I would think there would be a big chance of it leaking....

 

I had one a long time ago in my first car. It costed me $400 for the ragtop and I installed it myself with the help of a friend. It's not that tough to install, you just have to have some ***** to cut your roof open. And measure twice, cut once. Mine didn't leak, but it did flap around in the wind when it was closed. Got it from street-beat.com.