Ok this thing is controversial, underrated, whatever. I can't figure out how one can't be satisfied. Definitely the ribbon controller strip is not large to fit the average adult finger, but this way, the user is deeply triggered to insist and push through the frustration. So funny! And the playability with the pen, it does wonders as well. Really crazy features and sound capabilities packed into this "toy". With the possibility for AUX IN signal to be processed by the internal filter + LFO, and the delay module on top of it, well, you are ready to go where you can't even imagine. All comes with a pure analog-style. The sub-oscillators and PWM buttons bring it to another level of a scary fat synth which has nothing to envy to most known trademarks, seriously. Forget about it if you are looking for nice Moog sound of course, you just don't get that. The envelope is what it is (don't expect total control on VCA either). Only thing you need is to balance the main volume with the AUX IN volume, if any. As my unit came, it was immediately modded so to run on power supply and not just batteries. But, honestly, I'm so happy that it came as it was! I can't complain anything at this price. Marvelous.