One thing that never ceases to amaze me with the PA2X Pro is the way a style varies when you play, for example, a seventh chord (or an equivalent, like a ninth, 13th, etc): it's like you were triggering a fill of some kind, because the style becomes more animated and the drummer plays different percussions, adding even a cymbal here and there, just like a real drummer who is anticipating what is about to come. This kind of variety makes less important the need to trigger a real fill with the dedicated buttons, not to mention the possibility to add even more variety with one of the multipads (especially if you take your time to program a sampled groove).