Great great great!
I absolutely love this beat--*this* is real hip hop, not the garbage they play on the radio. It reminds me of some of the great independent stuff I used to play on my radio show back in the day.
My biggest criticism is that some of your transitions are choppy; you should try to avoid letting samples just cut off suddenly. You should also make an effort to find more samples to weave in, or at least toy with the beat--that will help keep it from getting repetitive. See if you can find the old Tomfoolio tracks Son of Drifter and Sleepwalker; those are good examples of what I'm talking about.