Becoming quite a producer there, eh? I wish I could be as active as you :). Just posted my first song in a few months, I think it was :o.
Anyway, good song all in all. I would say that it's very well mixed in general, though I think the vocal sample is out of place (very weak, for one - not a fault of the sample, but of mixing) and some of the instruments are underwhelming. There are parts where I feel the expression is a bit thin.
It's a little bit repetitive, which is okay, but for a song around this length, it should be far more varied. The rhythm is very straight, and there aren't many risks taken in the harmony, making it more interesting or dissonant - which is something you could look into.
I still gave it a high mark, however, for the effort in mixing and the feel/atmosphere of the piece. I feel the piece is very well joined together, like you achieved exactly what it was you were going for.
I'm looking forward to this ep and anything coming up from you in the future :). I'm releasing an ep myself, trying out this thing you people are doing :P.