Played Army of Two for the first time yesterday, I bought it with my friend, so we could get some co-op action going. First when it started up we were introduced with a complex of menus, before moving into the training environment, which I found a bit tedious, and as we progressed in the game pretty useless, we came across things that we had to figure out as we progressed (by using the six-axis). You have a GPS system, which tells you where to go, but the map are not unique, and there are no exciting landmarks if you do get lost. The graphics for the cutscenes are fantastic, but the game graphics not as spectacular. The AGGRO system, is a great idea, and if you use it well it does feel and look pretty good. The controls are not that inuitive, within the game there is no difference between the two characters, they have no signature moves, and when you interact with one another they do the same things.
The story line is given in-game, so you miss out on half of it preferring to kill people, that layered with the over relying of your partner so you can both interact simultaneously with the sceneary before you can progress.
The AI for the game is average, you do see the enemy do stupid things like running away from a gun fight, I have yet to see the AI for your partner in one-player, I personally would not hold my breath.
That said, I am comparing it to COD4 or even Rainbow 6, this is a different game, and the two player co-op action, will keep you hooked for a short time. The question you have to ask is, is this worth £40, unfortunately I fail to agree, there is not enough to keep you coming back. This will be a game, that you'll probably complete then sell straight away.