Yeah, I'll go ahead and join the chorus singing that you have too many yois, but pretty much all of the other sounds in this track are pretty damn good, especially for a first outing with dubstep. I might also try adding more than just sub-bass to your drop sections, so that you can enjoy the bass cannon without needing a subwoofer. Think 'X-Rated' by Excision, or anything at all by Bassnectar.
Also, how does music. This is such a musical piece, I just... I can't

So yeah, great job here, just work on what I tell everyone else to work on - dubstep sound design, which is absurdly difficult, but very rewarding when you can get it relatively right.