I bought this car off the showroom floor and have had it for 11 years. It is still to this day, sleek, fast, and hugs the road. It handles great in snow, rain, and perfect for taking corners fast in optimal weather! I have contemplated buying a new car, but I have yet to find one that looks as sporty, classy, and built for comfort as my Grand Prix. I have had to work on the transmission, but all in all, this car has been very reliable.
Body style, the way it hugs the road and overall handling, interior design.
The cup holder is rather useless, other than that, I can't think of anything I would change.