Sounds Great
Really like what you're doing, I like the way the feel of the piece moves but 2 things; the frums sound a little sharp and dry to me, I'd add a little reverb on a bus, personally.
Bigger issue; I think that low drone sound at the start is clipping; check your levels. If it isn't, it just has a really unpleasant overtone to it that sounds like digital distortion and I'd change it.