Big sound, little package, best mini-keys I've ever played. Probably the most easily programmable FM synth, ever. The tiny speakers sound surprisingly good and the batteries last long enough for a good long jam in the park. Better yet, plug it into a good sound system and blow your mind. Yamaha's online Soundmondo site is a great bonus. There, you can use a patch editor and share patches with other users.
AEJOTZ (pronounced A-jotz)