You're in luck, I own one.
I'll try to keep it short and simple. If you're after a stage piano and this is within your budget, buy it as in my experience it can't be topped (which is why I bought one). It 'only' has thirty different sounds, but I have to say, if there were thirty sounds that I wanted my piano to have, it would be these (actually, in saying that, there is an EP sound I would have killed for, but other than that, it's fantastic), and they all sound superb. The best thing about the it, however, is the action, and when I say that, it is absolutely great. I've never played an electric piano with such a perfect action, such great balance and with such accurate response. As you can see, it looks like something you'd find in Ikea or some sort of horrible furniture shop, it's really not very pleasant to look at. However, all of the plus points about the SP-250 easily outweigh it's looks.
I cannot recommend it highly enough.
EDIT: If you want some pictures, just say the word.
