Ref. Internet manual. What motivated my choice, especially the number of controllers (some thirty faders, knobs, buttons, pad etc. ...) and the ability to manage different velocity curves because I had problems to overcome in VST. In short, it connects via USB so does not use a MIDI (it's always something gained).
Connections are on the side, which is convenient in many cases. It can also import specific configurations of software or other MIDI devices.

UTILIZATION

Touch is quite sensational compared to what is now finally I think. A big cheer for this semi-weighted soft but firm. The keys are of good quality.
For cons, the general configuration is not simple at all. Too few buttons config. There are two or three manipulations that I often do, I spend 30 "to one minute each time because you have to choose menus with a scroll wheel too sensitive and confirm the time. In short: It> click> system> confirmation system> choose No ...> configuration options> confirmation of the choice> back normal, it's too heavy for long. To say that I complained of configs Yamaha is much better here.

OVERALL OPINION

I use it for several months.
Just to touch, but I do it again this election just for this.