it's not dubstep if there's no bass, put some subbass in there. and that stopper is so bad, fjhgad;jla... this has a severe case of brostep-itis, no bass. the drop was unexpected, there was almost no actual indicator that it was going to happen. its also very slow (not bpm-wise, it just doesn't go anywhere), lots of reverb isn't a good thing either. your snare/clap does not live up to the kick at all. and i have to ask, was there any mastering done at all in this song?
3/10