I've bought it 4 years ago.
Pros:
It is very steady, very easy to use with ableton live, superb if you use it for triggering clips, mixer and fx processing.A very good daw controller.
Good for live shows and studio. Very nice light buttons colored function. It helps you understand without looking on the screen which clip is playing and what you can choose next. It is a plastic but solid enough hardware.
Limitations/Cons:
Fx knobs: The fx functions are following a random appearing order on the dock, depending on the specific effect you want to manipulate. So you have to customize sometimes.
Not easy to use the volume faders, if you want control more than 8 channels.
The volume faders are not reacting according to the values / (fader position in the software) of the new channels.
If you move them a bit the track volume can change rapidly in to an extreme high or low position.
Problem:
Until few months ago it worked perfectly well.Then a problem with solo buttons occurred. The buttons suddenly stopped working - also no lights on -. AKAI told me there was maybe a problem with the usb connection/power system.
Thanks to thomann warranty and the great work of thomann service team it now works as new.
I recommend it even though the cons and the solo buttons problem.