Depends on what you're looking for. When it came out for DL, I got it, and didn't think much of it. I'm a loyal CS fan myself.

On the other hand, SYG loves AA. The main thing you have to consider is if you want realism. AA is more realistic than CS. The guns are less accurate. They will jam. The action is MUCH more slow paced.

I can't stand any of that myself, so I stick to CS. The most unrealistic fun you can have in a first person shooter.

What is it they say about silence being golden?