Nobody needs a theremin, but if you have written a space themed song, you're close to needing one. That's why I bought the Theremini, and I am not disappointed. The learning curve is significant but the Theremini is surely the easiest theremin to learn on. It is as fun and frustrating as videos promise. The antennae are no easier to interact with than you may imagine, so practice practice practice. The voices are good. I don't know why there is only 1 CV out when there are 2 antennae, that makes no sense but whatever. Mine only got 4 out of 5 stars because it came brand new without half of the power cable (the wall side, not the transformer side). Luckily it is a pretty standard cable that I already had one of, or I would have had to return the unit.