First iteration of it, didn't dig it. Couldn't get seperate audio channels into ableton, had bandwidth issues, all sorts of issues.
Uodate comes along, and it stung me. Couldn't do a thing with it, so had to reinstsll, change usb ports etc
Now, I really adore it. I like to have a nice hybrid of a4 hands on, and Overbridge.
I think it's great, now that it works.