I have a chance to pick one of these up used for about 75$ and was wondering if anyone on here has/had one and what they can tell me about the build quality and/or the overall usefulness of the device. I am looking for something to help with getting into Ableton and for producing in Logic Studio I currently have 2 Akai LPD8 and a 61 Key Midi Keyboard. I like the sliders this has but mainly the endless encoders. Any input would be great thanks.