My Yamaha ketboard (YPT 310, now superseded by another model) was only half the price of Mike's Casio, and comes with masses of features, more than I could ever want to use. You can even make a noise like dog barking, a creaking door, or (get this!) applause, although I have to say the applause sound is not very convincing. Perhaps unconvincing applause is all I deserve now for the awful arrangements I am creating on it.
But I'm convinced that I'll learn quite a bit from using it sensibly, an am having lots of fun with it.

Marje