Pretty cool, good mastering, Just a few things:
Don't get any wrong ideas from the apparent negativity of this review, I really liked the track overall and gave you a 9, but I'm gonna skip over the good aspects of the song and only include potential areas of improvement in this review cus I don't have much time.
The first thing that stood out was the rise effect in the beginning, you incorporated it well but to be frank its pretty bad quality. Instead of using samples, try making your own (just takes a nice sounding synth and a pitch slide tool), or if you do use samples, find one that's higher quality. Whatever, it's not a big deal, I'm just sayin' cus it was kind of noticeable to me.
The second thing is that the intro was pretty lame. I don't know what else to say, put the vocals there instead or add some ride or high pitched synth with a basic melody? Maybe some sub? Idk. Just a kick and effect rise intro is pretty boring IMO.
The last thing is that the bass melody gets boring, the switch up at :57 is really nicely executed, but if you're tryna make this into a full song you're gonna need a little more melodic diversity. Yes, I realize this is drum and bass, I listen to a lot of it, you're allowed to be repetitive but some more switch ups or add ins would be nice to keep it interesting.
Once again sorry if I'm being a cynical dick, the song sounds real nice, you got those drums near perfect. I'll keep an eye out for new tracks from you!
Peace~
AlexCo 
