I bought this keyboard in 1989 (or maybe early 1990) for, if I remember correctly, about $130. For that small price it has proven to be a world of fun. It provides 100 voices for its lead instrument and 100 rhythms. I'm not a keyboard player at all, although I do know my way around the notes. Therefore I've used the rhythms more than the lead voices. I've spent untold hours playing along with many of the available rhythms and even recording hours of play-alongs. The un-uamplified sound is, as you might imagine, weak and tinny - sort of like early generation transistor radios. But when you run it through proper amplification, the sound is amazing.
The keyboard has all sorts of midi capability which I've never been interested in (or brave enough) to explore.