I've had the PSR 2000 for almost a year now. I've used it extensively for music production, as well as for several performances. Needless to say, this keyboard has many features, many of which I personally have little or no need for. Just out of curiousity, I tried out the Groove feature (in Style Creation). I'm amazed! Truly this greatly extends the usefulness of the styles. It takes just seconds to convert a 16-beat style to 8-beat (for example), and with a little luck, the result is very playable. Does anybody here have experience using this feature?