Clearly a quality product, I succombed to 'Dom's' YouTube review partly because I did not have a decent slider control to apply expression to my DAW music mockups. As a experience pianist, using a sustain pedal is second nature to me, so pushing a button to work the sustain (meaning one only has one hand to play piano) is not any use to me - despite the multitude of reasons promoted by the sales team ie. using an arpeggiator etc. I considered sending it back, but it does what I essentially wanted it for, without spending a fortune for a more comprehensive device.