I've never played anything so bloody in my entire life, and the frightening thing is? I LIKE it.
As usual, the game is difficult. Hard as nails. But once you master the game, it can get a little fun. It's good whenever you're angry at enemies that always get the one-up on you. Because you can get a little payback by literally cutting them to pieces right before your eyes. It's executed beautifully, and seeing them still trying to fight you minus a few arms and legs sends chills down your spine. It's that good.
The level designs are very elaborate, fresh and new. New York's my favorite level simply because of the incredible amount of detail-work. I really like the different weapons you can use, and all of them are powerful enough to cut your enemies to bloody shreds. You can even finish off an enemy with their appendages removed to quickly put an end to their misery.
Overall, NGII is well-deserving of its M label. The action is non-stop, and the pacing never slows for a second. This is a worthy addition to your library.