Being Gran Turismo, there are, generally, absolutely no surprises. It looks/sounds exactly how it should look/sound, so thats the first point.
I must add though, that it feels way more fluid than prologue, whether driving a crappy little 600cc thing or a monster AMG Merc. It feels.. more.. fun :)
My GT Force steering wheel (bought with GT3 on PS2) is really good, much better than with prior iterations of the game, good work there. I don't think I need a new one at all, although wouldn't mind comparing. tone: the pedals are OK actually, especially the way I drive (flat out > skiiiiiiiiid > flat out). Fine with a Dual Shock too, but the wheel is more immersive and accurate.
It still suffers my pet hate: I currently need a pre '79 Jap car, a 60's car, a classic European car, in order to enter the last three competitions in the Beginner class - I hate looking for a purchase!! First you have to look at the prerequisites, then come back out, go into dealerships, pick a manufacturer, look at the options, no nothing there, pick another, go through four or five, forget the prereqs so go back to the competition, store in brain, come back, try the used cars etc. etc. why can't it just give me a suggested list of cars I can buy so I can clickety buy, or maybe hit triangle for buy best option?
I'm sure most of you will say this is part of the fun, well, great, for you - I can't be arsed!
Following the blue/red line makes the game too easy, switching it off makes it too hard, for me at least, being a mere mortal more into arcade games. I'll admit now, the line is mostly going to stay on for a good while yet! It's too wide and bright, spoils the look.
Also, it's really easy to win many races with an overpowered machine, both online and offline. I feel like a bit of a fraud, takes the fun out.
My score: no less that 9.5 out of 10, it's just incredible. Sterile and bizarre as ever, but huge, insanely well polished, perfect in every respect... except I just want it to help me with the sea of decisions a bit more, I'm no strategy game fan.