Nice 'n' freaky ambient
This is really good, i like the spacy feel provided by the reversed (what is that, guitar?), though some parts of the track got a little too rough, at least for my ambient preferences ^_^
The "dribbling" effects sounds very nice, a nice additional could be a long dub-like delay once in a while. I was thrilled when the weird choir came in, they sound great hidden in the background as you did.
For ambient music, i'd suggest a little more reverb to smoothen things out, and drop that 4*4 kick, if you must involve a kick, i'd suggest something a little more innovative (try listening to some IDM, like Aphex Twin and you'll see what i mean).
At last, another thing you could improve is the end, it dosn't seem very natural- or loyal to the track to end it all so sudden, a fadeout or maybe some reverse-instrument solo with some weird effects and then slowly cut it all off with a low-pass filter.
That is all,
T7
Ps. If you'd like, you can check out my stuff too :D