Idk how many times I've been listening to this, but I think it's time to leave a review :)
I usually don't really like dubstep, but I have to say this track impressed me the first time I listened, and still does today :D I particularly like the dark ambiance of the song; each time I listen to it, I imagine either an old deactivated factory, or an old mining facility, or anything that implies some machinery in darkness that was inactive for a long time and got re-activated :)
One really good point I noticed : in the beginning, you used and instrument/sequence you never re-used later in the song. That's what made me press that play button again after listening to it a first time. And I pressed it again, and again, until I became kinda addicted to the song :D
Easily deserves 5 stars in my opinion. I usually find some improvable points, but I honestly think the good points largely covers the problems ;)
Keep up the good work! :D