This is the greatest tool I have ever used in working with beats. pHATmatik is truly an amazing tool. I played with the demo a lot and finally purchased it yesterday and love playing with it. I don't know if I can add much that hasn't been said before, so i'll try to just mention a few points. First, this program does not make you inherently lazy when it comes to programming drums. It really inspires me to tear up the loop and rearrange everything.
I love that you can pan individual slices in order to make the drumming sound more open and realistic. The asdr, pitch, filter, etc for each slice are also great. The universal effects are just icing on the cake in my opinion. I would pay $99 if all it had was the individual panning, amp, and filter feature.
The gui is very easy to navigate and just about one of the nicest ones I've seen. The easy export of a midi sequence and individual slices makes life very easy.
The only thing i would like too see added would be having the individual amp feature go to +6 db, but that's my only "complaint."