This is definitely a hardcore game. The campaign might be fun and short, but the online multiplier is great! You will want more this violence is definitely not like Call of Duty 5 where limbs fall out if you shoot them. Infinity Ward did great and you will want more after you finish.
So after I bought CoD4 MW I got MW2. I beat the campaignwhich was amazing. It really does pick up where CoD4 ended. Special Ops was a neat, well designed challenge in addition to campaign. Now when I started PSN multiplayer, it had promblems. I play TDM until I unlock Search & Destroy and I was 7-1 in my first S&D match. After the match ended I go to edit my classes. I'm suprised when I had 10 classes. I check my rank because I just started and I had an AK47. The host had a challenge lobby. If you can avoid hackers and actually play fairly get the game.