The Y.E.S. can be very helpful in getting you started in learning to play. (It's not going to turn you into a pro player all by itself, but it can help you get a good start, along with other materials you may pick up from other sources.) It has 3 levels of lessons, each a bit more challenging. It allows you to work with each hand seperately and then together. It has a 'waiting' feature which waits for you to play the correct note and it features a 'minus one' mode, which allows you to play the melody line in place of the one included on the MIDI track. You can vary the tempo to suit your ability. Plus as you learn by playing any of the built-in songs or songs you downloaded from the internet, it even will grade your performance. Also included in the software is the Digital Music Notebook - a multimedia internet service that "enables you to preview, purchase, download and print learn-to-play music books and chart-topping music sheets."
All this plus great sounds in an attractive keyboard for under $200. Deciding on this board is (IMHO) a no-brainer!

Go get one! (No, I'm not a salesman, just a fan!)
Tim