The things that I don't like what they did with the SD40 is the elimination of important arranger physical buttons like intro, reintro, endings, sync start/stop etc and made them screen-based that virtually inaccessible when you're displaying lyrics! Intros and mic/harmonizer volumes, harmony types are still not saved on registrations. Piano sustain are messed up when re saving SMFs. Other than these, it's a great arranger module.