It is very comfortable with heated leather seats, and I fit in it well (I'm 6'-4") I'm used to 2 door cars and the B pillar is too far forward for my likes. It's very quick for its size and fuel economy. It's the fastest big 4 door I've seen that can still get 29mpg on the highway.
It's a pretty practical car yet still decently fun to drive. When that supercharger kicks in you really feel it.
I personally like sports cars, I last drove a Firebird Formula it's a whole different type of car. Speed wise this Grand Prix is impressive for what it is under 7 sec 0-60, but the front wheel drive feels stupid sometimes when your used to rear wheel.
This car is a great compromise if you like speed, but have a family and need better gas mileage than a V-8.
I think it might be an option on them, but mine does not play MP3 CDs or have an input for iPod/mp3 player If I could make one suggestion for the manufacturer; make mp3 a standard. Seriously, that has become the "cupholder" of this era of auto manufacture.