Hmm, this is different. I like that. I really like the instrumental here. My only complaint would be that when the vocals are slowed down this much, they don't really sound right, but the only way you could really get around that would be to record new vocals. Actually, if you can, I'd recommend doing that, because I like what you have here.
Youtube | Soundcloud Genres: Rock, metal, all that good stuff. Doing things, very slowly.
Anyway, I liked the opening 10 seconds (sustained notes always get me) and the chords themselves. However once the vocals entered it started feeling wrong. They just aren't hectic enough to the song. The other issue is that the song is really repetitive and while that can be fine, the vocals didn't really add enough to take away from this. So in all basically what ThatRobChap said: Good instrumental but the vocals are wrong. New vocals would be good.
"Wherever we are, what we hear is mostly noise. When we ignore it, it disturbs us. When we listen to it, we find it fascinating." - John Cage