I Love This Keyboard
I use this keyboard at the moment mainly as a piano, and love the grand piano sound, which is better than that of the others in this model lineup. The extra power in the speakers is great and I find the ability to play my iPod through the keyboard very useful for working out tunes. The real time control knobs can be set so that one of them controls the volume from the iPod, which is very handy. The recorder allows me to record one hand, and then play that back while working on the other hand. Very useful.
I downloaded all of the songs for this keyboard and the songbook and that will keep me busy for long time. I put the downloaded midi files on my thumb drive, and when I plugged in the drive the songs showed up in the song menu without a hitch.
The keys have a great feel, and are lighter than real piano keys, which is desirable, since you might want to play a fast flute or percussion riff, where the weight of real piano keys could get in the way.
All-in-all a great keyboard that I expect will serve me well for a long time.