It's hit or miss...nothing sounds better then the original styles IMO....but some conversion are very good ...most sound horrible when converted from other kb's...it's a tedious process especially for the KORG OS because it's difficulty to audition styles from lets say a thumb-drive/SD card etc, as Korg uses a set folder system that has to be loaded first to user assignments to hear them unlike many other units.. Yamaha to Korg conv styles is like vinegar and water...Roland & Ketron & many KORG styles work much better.....have fun. Styleworks does a decent job of converting styles if they are supported by the program.