Apart from the fact that it gets insanely repetitive early on, its decent enough, with awesome production values

This

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V-Rock  the only mission that you will find different is the toturial mission , the rest of the game is doing the first level over and over and over ans over and over.

like 9 times and then at the end is VERY lame , it basicly tells you to buy the second one to know what the heck is going on in the game. 

Gameplay : 3/10

Storyline : 3/10

Graphics : 8.5/10

Soundtrack : 9/10

Overall : Don't buy this stupid game they basicly made it to promote the second one.

I hated it...but then I hate sanbox stuff. For every person that hated it there are 2 that loved it.

It was a good game with many faults. I wish I didn't have to eavesdrop so damn much.

I really liked it, and I really hate sandbox games. (GTA, inFamous, Saint's Row, etc. all suck)

Definitely buy it. The repetitive side activities are annoying, but they're actually pretty fun when you're going for achievements.

well it doesn't really delivers in any aspect, the frame rate is not constant, there is a lot of clipping,
there are like 4 type of missions and they repeat in every assassination, is no fully a stealth game since at the end and in some part is there is no way to remain undetected, and the AI is very very very poor ( not as smart as mgs1 enemies, yes the ps1 game), on the other hand, the cities do feel alive, and the climbing is very fun, but by now a lot of game are much better, knowing all this i bought like 6 month ago because it is fun, repetitive but fun.

fun for the first 30 min then you realize your going to be spending 6 hours doing the same thing over and over again.

It's very divisive, as you can see from the opinions on this thread :)
To me, it felt like a good 4-hours game insanely stretched beyond the breaking point, and never going where I thought it would do better.
Rent it.

It was pretty good game in the end, but wait for Assasin's Creed 2.