I personally thought the only 2 things that were really great about this game is The background to the movie and the unlockables. All the rest was okay!

Things I liked about this game:

You get all kinds of good background info on the gang that wasn't in the original movie.There's a bunch of weapons.There all kinds of different enemies and gangs (straight from the movie).They didn't stray too far from the movie. The story it's basally just like the movie.There's no cut scenes straight from the movie. It's all computer generated.The game has some really cool unlockables.The graphics and music are pretty good (matches the game perfectly).

Things I didn't like:

It's definitely a button masher (my fingers still hurt).There's not that fighting many moves or combo's.The load times are not the best but at least they give you art to look at while it's loading.I beat it on hard in 4 days (I would hate to see how easy it would be on normal.The stealth missions really sucked. 

Overall:

I really hate to say this but I'm going to say it anyway the game reminded me of State of Emergency. All you really do I run around and beat the hell out of everyone.

I thought the game was okay but it's only because I've seen and enjoyed the movie. I think the only people that will really like this game is older people (like myself) that are familiar with the movie.