The intro was awesome. Loved the little filter flip things making it go in and out.
Dig the portamento thing at 0:37 with the main synth.
Notes had this mozart vibe going (with the funky counterpoint stuff with the notes)
Dubstep's not my cup of tea, but the freakout part sounded pretty good. I don't know how that stuff's normally supposed to sound, but the womp womps were pretty good.