Kickass! Damn those guitars sound thick and bad (in a good way). I agree that the bass guitar could get boosted up in the mix. I'm listening on a bass-heavy set of headphones, and I'm still not hearing much. Crank it up..
Love the "Sometimes I wonder.." section. Shows some good songwriting there to let the instruments drop a bit.
The vocals are excellent. Whomever is singing is really good. Chorus is catchy and nicely separated from the rest of the song.
The kick is nice, but I wish the snare was bigger, louder, and thicker.
Overall a great tune, perfect length, and with lots of interesting sonic tidbits to latch onto. Well done!