ABSOLUTELY AMAZING!!
Enough about me, lets get to the game! So far my only complaint is the responsiveness of the steering while driving. That's always been a problem for me to get used to in previous GTA games and this is no different. The learning curve for the brake/accelerator/handbrake is slightly steep (at least to me) but I'm getting the hang of it & loving it now.
As most reviews have stated, the story is great! I've only played through like 2 hours but Niko is a guy that you almost hate to love. He's the typical badass that gets shafted and turns to crime. (Much to our delight!) I found myself more drawn into this story than any previous GTA iteration, and I'm not sure exactly why. From what I've played so far the story on this game will be great.
One new feature that I absolutely love is the replay. If you somehow mess up a mission, after failing out simply hit up your cell phone and it starts you out fairly close the start point for the mission you screwed up.
I've read some "professional" reviews and can't wait to try some of the small detail twists that have been added...such as darts and pool (already played bowling) and getting Niko plastered.
Overall, IF you're an adult and enjoy just playing around being a "bad guy" and being stupid...this game is most definitely for you! It is more than worth the money!