http://img.music-hardware.com/img/001/001826-Yamaha-PSR5700.jpg

I was too young when this came out to afford it, i only heard it in passing and it was one of those keyboards in the music shop that only the owner was alowed to touch and it was "wowed" every time it was turned on. Everybody wanted to own it.. Was it that good and ahead of its time? Did this also have 4 style variations? If so, why did Yamaha go back down to 2 for so long?