The game was pretty good from start to finish but I still stand by my rating of 8.5. After completing the game there is not really anything to do other then roam around and cause trouble. I have a ton of money and nothing to spend it on. I haven't played it since I completed the main story and played multiplayer a few times.
GTA Race (multiplayer) was really fun though. I had alot of good laughs with that.
If you liked GTA IV try playing The Godfather. That's a really good game too even though it's lacking in the graphics department.
I'm really looking forward to Saints Row II even though I never played the first.
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