interesting beat work to start this track.  I like the programming.  not super crazy about the high hat samples, they dont' sit right in the mix..

so this is a pretty nice dark roller.  I like the bassline a lot, but feel like it could use some higher frequencies.  I like the drum edits throughout for the most part, but I feel like some of the hits are chopped too short.. if you're playing them through something in which this is possible, try bringing up the release, or if you're editing the chop points yourself, you may want to widen your chops and use attack or fade ins to compensate.

My only major complaint with the track is that the atmospherics are a little too much in the background, I'd love to have heard them take over a little more once or twice in the track to add overall movement.  It may be the reverb, but everything outside of the drums and bass sounds kind of buried.

Besides all that this track is pretty solid.  It's arranged wonderfully, my only real issues are with your mix and a few of the samples/chops.  Great drum edits, good bassline, bass and drums sound good together, which is the biggest key in drum n bass, obviously, so good job there.

Arrangement - 4.5
Mix/Eq - 3.0
Total Score - 7.5