everything has been said about the features, I use only USB, but I guess the rest works very well too.
It is lightweight and not bulky at all, ideal for mobile use.

UTILIZATION

touch is not bad, although I have not had another experience like this keyboard, for all I do is quite enough!
the manual is useless, it's plug & play!


OVERALL OPINION

I use it for 6 months
this is my first midi controller
I like its many knobs and buttons configurable
quality / price excellent (that the M-Audio)
experience does not play in my case it's a question of means