It's mostly an amazing game overall, but I have a few gripes and will just mention those:
Here is my disclaimer: In terms of gameplay and what GT5 offers, it's badass. Lots of cars, lots of tracks, lots of stuff to do. I like it a lot. It's fun, especially with a wheel. But it aint perfect...
The rain effects don't look as cool as I thought they would. In fact, overall they're no where near as good looking as F1 2010s (ref:
http://www.youtube.com/watch?v=KVGOxvJ5BV0).
I love driving from the cockpit perspective, it's immersive and rad. Racing in the snow is way too difficult from this view (it's fine from a 3rd person perspective), but otherwise it's practically impossible. There comes a point where I dont care about the realism of GT, I care about the playability--make snow playable from the cockpit Polyphony! At some point, this is a video game and I want to play from the most interesting perspective.
Also, the graphics are mostly amazing. I mean some of tracks just have to be seen in their 1080P glory, but there are times where they're not too impressive. For one, the shadows look aliased to hell. I'm talking staircases for King Kong. You'll see this mostly during some of the really sunny tracks. In some cases models appear to consist of a low polygon count, but with high textures to it has this odd effect. It's kinda like the human models in the game--they look bad--particularly the faces. It creates this weird, hi-rez funk to the game. I dont know exactly what it is but there are times where I'm looking at the game and it looks kinda generic.
The load times are ridiculous. Even after going through the uber-install (50 minutes), the loading times in the menu system are tedious at best! I feel like everywhere I go I'm waiting from something to load. I'm not sure what's going on, but Polyphony needs to optimize this game some more.