Indeed - and that is what put me off getting one - I have a few insruments that I don't have time for, but until you try, you don't know if it would be fantastic or not so great. I can't really imagine doing mustang sally on it at the dog and duck. Crazy horses on the other hand...
But this, at near £100, as a pure music making machine, I can live with that, and also lets me know if it is something I would like to do.
I don't think you get many theramins at open mic nights