It's too empty; but not bad.
The song in general just sounds very empty and with a genre of music like Dubstep, you really gotta fill up the entire sound spectrum to please the listener. I can only hear the bass, the drums, and one extra sound in this song and trust me, that's no enough to keep the listener engaged. Moreover, I find it very hard to distinguish the so-called drop from the rest of the song, a drop needs to be obvious, here I can hear a vague build up and then the song kinda just floats into the drop, that's a bug no, no right there; what I would recommend is to do the drum build-up and then right afterwards, hit the drop and while on the topic of drops, add more sounds and instruments, like I said the song sounds very empty, I understand that you're new to music production (from what I can tell) so I won't really be to harsh on that, but do keep it mind for your next song.
All of that being said, I do like the introduction of the song, it feels like something big is about to happen. Also, the growls used song pretty good, in my opinion, though I would make them louder, in the song they seem to be ducking behind the other sounds, which is not a good thing; make the growl basses more prominent. So to conclude, not bad but it does need a lot more sounds, though I will say the sounds that are in the song are not bad and sound pretty darn good, just add more of them in your next song.
-Bow