Not bad, but it could be better. First of all, this isn't exactly dubstep. Dubstep shouldn't have constant bass the way this does. I'm not entirely sure what category this should be, but it might fit industrial better. The part from about 1:30 to 2:00 sounds kind of bad. You have too many different sounds going at once, and it just makes it sound chaotic. Take some of them out, or adjust the volume until it sounds better. This isn't really my kind of music, but its not bad. It doesn't really have anything to make it great though. Try adding some more variation in the sounds and the beat.
I know it's not really dubstep, but it's mostly influenced by it. Thanks for the feedback, it helps.
pound pound pounding my fucking head off. kinda cool in its own way.