It's a stiff learning curve, but after you master the nomenclature and button asignments....it's actually quite easy to navigate on the fly. I prefer some of the Yamaha features, but so far the PA80 is the only one I can use at work. It has the fewest compromises for my type of show.
The new model (IF it arrives) will have to have volume sliders (NOT touch screen) and access to sounds and drum styles with buttons. (again, NPO touchee) The touch screen can be usefull in some areas, but not my quick change spots. We'll have to wait and see.