Class Keyboard. The Oxygen 49 IV has my old Oxygen 61 I replaced. The build quality is solid and the keyboard is to play well. The pads are very good. This makes a real difference when a drum track to be recorded. This can be grooving properly. The faders and encoders (knobs) to govern well. Operate the keyboard with Ableton Live V9 and Apple Logic Pro X. The recognition is without any problems through the onboard Templates. For me a very good Prei / performance ratio. Highly Recommended!