I have just about every midi controller and didn't think I needed another one, but this is so very different! It does inversions and complex chordings and it is just really awesome. With this, you can choose wrong chords and actually be more musical as you hear and feel them. It is truly remarkable when paired with grain science, thumbjam, and the arpeggiator on Cassini. Don't pass up this awesome controller. On each of the pads, you can set it up to play three separate chordings as well as the inversion and octave buttons. No regrets getting this great tool.