I use it for 2 weeks.
it's beautiful, it's pretty solid, it is self-contained with batteries ... but it is very complicated to program ... Finally, after a few hours, I managed to do some stuff on cubase and once programmed it is great. I used to control Cubase: plugin, control of the cursor (forward, back, stop rec etc. ..) and mixing of voices!
what happiness to be able to fix everything on the real knobs. soon I will be using it to control some parameters of my MIDI keyboard. well, it's flexible to use even if there are only 4 knobs and a handful of button, but for 40 € in a store in Nantes, I'm rather satisfied! I recall that it's a bit hot to be programmed to start and to look for a long time because the documentation is poorly made but indispensable.
very good quality / price ratio. no equivalent in other brands. we can really do a lot of things, so we work on computer.