Absolute brilliance -- the Reaper sounds are wonderfully placed, and the segue from the slow intro into the harsher main section of the song is butter-smooth. I honestly expected something like this to come from a professional studio; after this, I really think you can do just about any style you want to, and do it well.
I actually like the ending and think it fits. A fuzz-out into an abrupt stop leaves the listener with the sense that something is cut out and missing -- and since it's the end of the song, there's no way to find it. It's just over. Nice.