I found the pressure sensitivity to be lacking somewhat. The kits that come with the unit sound good enough, but if you play with a more 'gentle' touch like me, then you might be left wishing the pads were just a bit more sensitive and sometimes I even felt that notes didn't trigger.
I think this unit could be great for beginners, or people who want to get into finger drumming, the portability surely is a good feature, so maybe its just not for me personally