Feature:
The built-in songs and the TV/lesson feature are not very useful as instruction avenues. But it's well laid out in terms of controls, functions and sound organization & access.

Quality:
It's very well made for a budget keyboard. No problems out of the box, seems to be holding up well. Good quality built-in speakers. We'll be using it for gigs as well as home recording and keyboard lessons.

Value:
Definitely worth the money.

Desirability:
It DOES look and sound good, but we got it more for its features than its 'wow' factor.

Sound:
Very good sounds. Smooth, authentic sounding pianos (better than you'd expect for a fairly low cost keyboard), usable organs, good percussion. The built-in lesson/TV feature turned out to be less useful than we anticipated, but over-all it's a sweet keyboard.

Ease of Use:
Intuitive interface, easy to get good sounds. Stereo piano used with the built in speakers is particularly impressive.

Support:
Haven't needed any contact w/Casio, so we don't have an opinion about their customer service. We did however need to get help from Zzounds (the first one was damaged in shipping) and we are EXTREMELY pleased with all of our dealings with Zzounds. Thanx again, guys!

Overall:
We won't be needing another general keyboard for a long time. Our next purchase will be an 88 key piano. We were very impressed with the sounds and features of this keyboard, and the price made it one of the few we considered.