OK, going for some critical feedback as you said, and I won't read any of the above comments. Just gonna write down what I feel as I listen through it:
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-sick vocal sample, ridiculously sick actually, and the shakers and hats are ridiculous
-piano and bass is on point
-hats could afford to be pulled down volumewise, nothing really competing in the hats' freq range
-bring up that kick!
-really cool how you manipulated the acapellas the way you did
-keeps coming back in my head, but the highmid/high stuff really doesn't need to be as loud as it is (that means piano and that guitar/string thingy playing those two funky notes at the end of every 4 bars)
-great bass guitar but it's too quiet!