Feature:
You get exactly what you pay for on this keyboard. Assigning parameters is done automatically for some programs and to do it manually takes me all of 1 second. Very simple to use. Also come with Ableton Live, which is a cool looking program but I'm able to accomplish anything I want with what I already got.

Quality:
Feels nice for the most part. For $170 it works. I wasn't expecting it to be made out of titanium or nothing.

Value:
You get what you pay for definitely. I have owned keyboards that cost $500 and they feel very similar and do exactly the same thing. If you're on somewhat of a budget and want a larger midi controller, then I highly recommend this keyboard.

Sound:
Doesn't make any sounds of course.

Ease of Use:
Like I said assigning parameters to the knobs or sliders takes me 2 clicks of the mouse literally. Very easy and simple to use.