I would say that the CD drive and burner is handy on the Genesys.
When I was with out a computer and needed to get some quick demo projects done, I was able to sequence a song on the keyboard, have the person record their vocals with the music and make an audio CD of the work. The CD is also good for backing up sounds, styles and just the different set-ups I use the keyboard for.
With just the Genesys and Sound Forge, I was able to get an original piece of mine on the local radio station.
I wish that they would seriously try to get more Gem products in the more popular music stores.
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TTG