It's a fiddly device. The whole mapping through an NI app is just shit, you always need it to run to use it fully. The touchpad pitch and mod controls suck. I often touch the pitch bend by accident and the resolution of both these controls is pretty bad. Lots of lag due to interpolation as well. The keys feel really cheap. No aftertouch is pretty bad but maybe not unexpected. As a stand alone device it fails the test for me.