In reply to Seppo Helava.

You could always do what I've been doing for the past week or so, which is waking up every morning thinking about how expensive the OP-1 is. I'm only just barely able to justify it based on the fact that I've been wanting it for years. I feel like if I had any more knowledge of or experience with making music, it'd be even harder to justify. A lot of the appeal for me is just that it's such a well-designed object (weirdly, the Native Instruments Maschine has a similar appeal based on looks alone), not the results you can get out of it. Even I know how to do some stuff more easily and better in GarageBand — like synching multiple tracks or takes, which is surprisingly difficult on the OP-1 — so the end result is unlikely to be as satisfying as you'd be able to do with Ableton and the Push.

Jeremy Blake is one of the biggest proponents of the OP-1 on the internet, and probably one of the biggest drivers of sales, but he acknowledges he has to take all the OP-1 stuff he makes onto Ableton to turn into a real track. And he's got at least one video that points out how much a computer or iPad can do that the OP-1 can't:
https://www.youtube.com/watch?v=fa-UDAoPeJ0

I still like the thing, but consider it mainly for experimentation and playing around with, rather than expecting to get any "real" music out of it.