The car has an excellent powertrain, the transmission is said to be very reliable and the engine (3.8 Series III) is the best series yet. I also like how the transmission is geared to keep engine revs to a minimum for added fuel economy.
Thus far, I have averaged 23 and 26 mpg, both times have had roughly a 70 mile highway trip out of 200 miles. Overall, I find this to be acceptable.
My Grand Prix was listed for $28,000 when new. The price I paid for it just 4 years later - $11,500. The depreciation helped me get a very well equipped vehicle, and I pay just $101 a month after the trade in and down payment.
