Let me start by saying this could be a brilliant device. It sounds good, inspires and is powerful for creating music but .. here comes the 'could be' part...
The elephant in the room: The quality is abysmal. My device works as it should but (and its a big one) its build is shoddy to say the least. The OPZ is warped, the rotary encoders, which are magnets pop out. (not only when upside down but are being pushed outwards by their own magnetic force all the time. At times the buttons also double trigger. This is completely unacceptable at this price. I should have been weary of TE after I bought one of their Pocket Operators and the quality was bad. But I thought that it was an inexpensive device so didnt think much of it.
At first I was in love with what the OPZ could do and couldn't see myself returning it, but two years down the line I'm sorry I didn't. The bad quality really pushes me away from using it and it just sits in a drawer. Waste of money ultimately. At TE, the sound engineering and software team is probably doing a good job but hardware is abysmal. The price is not justifiable.
I'm not being unrealistic here. Do your own research. This bent grey piece of plastic in front of me is proof.