Very Cool.
I'll be the first to say Drum and Bass is not my most-listened-to genre of all time, but that was pretty enjoyable to listen to.
The structure is spot-on-solid, so you don't get thrown off at all by the changes of instruments. I've only been on the site a day and I know this does not equate to how utterly random NG songs can get, by any means. The transitions worked really well.
I like the instruments (the piano melody especially) and synths you used; nothing gets too piercing and nothing important gets drowned out by other things. It is a very good-quality piece, in terms of sound and everything otherwise. Good job!