Very nice.
I liked this whole song, but I especially liked the layering of a softer-sort-of piano sound over the dubstep bass. Not (at least from most of the dubstep I listen to) a very common thing to do. It definitely worked.
One thing I would suggest, perhaps, is getting the dubstep bass to gradually fade out around 1:30 when the trance part kicks back in again. Just an idea, and this piece still gets a ten from me without it, but I think it would sound very cool if that were to happen.
5/5, 10/10
Excellent.