ShadowLugia, It's pretty good, my main problem with it is that you won't get the most out of it if you don't play with friends. It's all about coordination and tactical maneuvers, and if you actually do that in multiplayer, it's crazy fun. It feels a lot different from other shooters because it's so much more tactical, there's a lot more customization (Gunsmith is amazing), and it's all about completing objectives rather then killing people (although you do have to kill people anyway).
To put it short, if you like games where you can charge in headfirst and fire away CoD style, you won't like this. To me however, who loves strategy, it's awesome.