So the resemblence with Gears of War has already been made, but it also shares some similar traits with the Halo series as well. Enemies look similar to some of the enemies seen in Halo and the score shares a similar vibe as well.
It's a decent shooter, some bits can be a bit frustrating, like being shot at when in cover or falling off the edge of a platform.
The game is not really easy, in fact I'd say its as challenging as Gears on 'Hardcore' on the normal setting, its pretty tough especially when you are being flanked by enemies at all angles.
Graphically, the game looks like something from last gen, blocky and muddy textures don't make the game look pretty. The cinematics are pretty great though.
Gears of War it is not, but it stands as a decent enough shooter to hold us over until Gears of War 3 if you are getting a bit bored of the Gears 2 online stuff.
For Goodness sake dont go on what everyone else says and make your own mind up, as a hardcore Gears fan I even found some fun to be had with this title.