I just played MW2 multiplayer for a bit and I can safely say that I'm SO GLAD I never bought it.

The guns have no recoil and all the battles are just spray and pray. There was also way too much lag. Sure, it was playable, but there were plenty of annoying spikes.

Bad Company 2 is just much superior, especially in the graphics department. The gameplay is also much more enjoyable in my opinion.