Gary, Just my opinion here but with the number of programmable buttons and customizing you can do I don’t believe 3 hours is enough to get up to speed with the changes to the OS and the Playlist feature. If you had more time and owned the board I believe you could have had a better experience including getting to the next song quicker and to lyrics or anything else you may have needed to get to in a hurry. Although I have not played or own an SX900 the OS pretty much mimics my Genos and from my experience the new way of doing things does things better for an on stage performer than past PSR keyboards. Once you get a handle on Playlist you can’t beat it at least that has been my experience and I too used Music Finder on the older arrangers along with registrations. The new OS isn’t rocket science but like anything else there is a learning curve.