It seems no one ever mentions the downside of Tyros 4...and I know there are things people would like or dislike about this unit. I have a few things I'd like changed on my S910 that are still IMO problems on Tyros 4.....the MFD that wont save transpose, ability to play style,SMF, Mp3 simultaneously, Bigger display screen, & I've given up on the VH/VH2 processor altogether. Tyros 4 is a very nice unit but it needs improvement....I hope that happens in future offerings very soon.