Before I start, Keep in mind I only spent 150 dollars on this car. Granted it needed much attention and care, it was 150 dollars well spent.
I did install a new alternator, and brakes, but I am not willing to change the rear main seal. I will just continue to put about a case of oil per week into the engine. As it drips out onto my driveway. As long as I keep the correct amount of oil in the car it runs better than most of the cars I have owned.
As for the gauge cluster, the Grand Prix's with digital gauges are known to malfunction for some odd reason and they are very hard to find (That also work) in a salvage yard, so I just replaced them with the less sophisticated needle gauges from a base model grand prix.
Brakes and plug wires are no surprise for any car reaching the 150,000 mile marker so I can't complain about that.
As for everything else the car is very comfortable, very stylish as for the interior design, except for the hideous tan color inside, gray is more suitable to my likings.
The car handles like a dream, Very tight handling and its not at all "Boaty", also in the snow, it will pass a 4X4 anyday, Unfortunatly I have not been able to kick the rear out in the snow to powerslide (Just for fun, in the safety of an empty lot of course)
In my opinon, if your looking at a Grand Prix By all means Go for it.