Used for a month. Mine meets the sweet name of YDD 60. From what I understand it is a DD with a 65 power (it's hard to believe that it can be sold without!)

Paid for the reasonable sum of € 260

Property:
* Compact, easy to carry / store (fits any snare stand)
* Lots of sounds including a majority of very good quality drum kits percussion to Japanese, there is something to create very nice custom kits (for cons to moo, and grouiks grouiks to make people laugh by gnomes I do not garden)
* Arrangement of pads similar to those of a drumkit of drums.
* Two replaceable come with pedals, including a velocity sensitive
* A lot of settings (sensitivity of the pads, more reverb can be switched off ...)
* Compatible with General MIDI (GM)
* Linked to hand-percussion
* Top speakers (average quality, some just for bass drums, but practice to practice without a headphone or for hand percussion)
* Very good quality / price ratio (almost constant Yamaha)
Not good:
* Pedals really poor quality (thankfully replaceable!). There is a small bug in one of Charleston who occasionally works in reverse (to cancel the said bug, disconnect and reconnect or turn on and off)
* No gradual opening of the cymbal hi-hat (open or closed only)

In conclusion: A very nice little instrument when measured space, the move to train or to register computer music / Humanizing MIDI patterns.