I had it given to me as a gift for the 360. Beat single player quickly and got bored of mp just as fast. It's fun, but not a huge improvement over MW1. Sure there are fun new gadgets like the pred or the AC130 in MP, but nothing that really kept me playing.
Now if they put in dedicated, I would probably buy it for PC and play it a lot more than I do now on the 360. It just doesn't feel right playing FPS on a console when you did it for so long on PC.
Sadly, the only thing that will come of this is more DRM, which, like abstinence teaching, has proven to not work with kids or adults.