I enjoyed it and think it was a lot more fun to play than Doom 3, although the game world was smaller than I expected after taking so much space. As for the story, it started well and continued to be well for quite some time, but I didn't really like the end as it was rather abrupt and left too many questions unanswered. But overall an enjoyable experience that I recommend

Haven't tried any of the multiplayer stuff yet, so I can't comment on that.