I wouldn't cut into a car like that. If you want a convertible, buy one made from the factory that way. Not that these guys don't know what their doing, this is just my opinion.
Aequitas, I can't really explain why I like mine. It's nice sometimes to drop the top and go for a ride. I only drop the top probably a handful of times a year. The weather has got to be just right, low wind and not too hot. And...you gotta be careful of what's in the car...cuz if it's papers or something like that...the wind will suck it right outta there.