I have one of the original white Prodikeys. It's on my wife's computer now (her idea - I was ready to eBay it). It qualifies as an arranger with the included software which is pretty elaborate really even though it's on a kid's level, but the keyboard itself is little more than a toy. The keys are very small. I used to have it on my office computer back when I had a dayjob and noone knew it was a music keyboard because the wrist rest/keyboard cover does a good job of hiding the keys. I used it to work on Band In A Box files in my spare time. Not a substitute for a real MIDI keyboard but an interesting and unique goof-around thingie none the less.