Gadget play, or even to assemble, comes with a book in Japanese that contains lots of pictures of vintage synths. Pif gadget magazine as we saw a kid, but for teens and adults.
All buttons are functional, for against the attack and decay are not obvious ...
With the Stylophone is not great and not accurate. Anyway, I do not care of the pen, I deleted and I use a sequencer to drive my Gakken that I changed. (Attention is kind of manipulation is possible with a modified Gakken)
-The sound is great, it sounds old Bouzin analog. As against many blows, the white noise, it likes it or not like. There are so many that if I breath a song sequence on a measure, marks the first time can be partly masked by the blast. It has a much better record of the severe acute. Very good for creating sounds shrill and gnashing analog.
Very good, but only negative, it is fragile, every time you use them it gives the impression that one of the knobs will snap in your fingers. The nice thing is that there are lots of mods' available on the net, you can even turn it into a synth with a lot more editable parameters. But hey, it must be remembered that a toy is analog, it's nice to improve it but it is not much to spend a fortune on electronic parts to turn it into gas plant. Unless you do this for fun. on the other hand, watch out for the price I had not even paid 20 euros, 30 euros but port fees. (Ordered directly from a Japanese site)