I enjoyed it well enough, the shooting is decent and the story is serviceable, but it doesn't really play like an id game, unfortunately. It's more like Fallout 3 with tighter gunplay - its definitely not as good as even Doom 3, and doesn't hold a candle to Wolfenstein or DOOM.
Also, SPRITES:
Sooo maaany sprriiites. They got the game's textures looking fantastic but all the vegetation in the game is like completely flat, camera-facing 2D spritework straight out of the PS2 era. Its kind of embarrassing. The rest of the game is a fairly competent technical achievement, to stumble across that kind of blatant misstep is just sad.
Also, SPRITES:

Sooo maaany sprriiites. They got the game's textures looking fantastic but all the vegetation in the game is like completely flat, camera-facing 2D spritework straight out of the PS2 era. Its kind of embarrassing. The rest of the game is a fairly competent technical achievement, to stumble across that kind of blatant misstep is just sad.