Everything has been said by Tyokkan.

UTILIZATION

It is relatively easy to use for basic sections. But if you want to push the possibilities without knowing it is more complex (I had to understand himself, having received pay from a friend without instructions, and without that it knows the use).
The manual is very clear and helpful (the box is convenient costumisable rhythms).
And a third point: even if it does not predict a lot of time, have full effect readjusted every time you turn is annoying.

OVERALL OPINION

I use it for 3 years (or more I do not know), and despite the limitations that I feel I'm really attached to his his edition (and not too electronic). Although his polyphony is (very) small (7 notes).
I still put on hold as mine has not aged well, and some buttons are a little hard of hearing (and must be emphatically beaten up), and a key spring (it works fine, but is a small acoustic noise in back). Also, be careful to buttons that are pressed, that turn on and off randomly.

So basically, an old keyboard, but old.