Well, Gunnar Jonny came closest to what I thought was missing.

It's drum breaks and drum fills. That's a terrific cha-cha style but it's TOO dominant....takes over the whole show....it needs to be "worked." I enjoyed the video up to the half way point....then I fell asleep in my mashed potatoes from the boredom of the rhythm. 3:09 minutes of a strong beat like that, without breaking it up violates the Geneva Convention!

Now you can get away with no drum breaks at all on an easy bossa nova, but not a cha-cha with that power that Yamaha put into it. It's a really great style but it can't be left to run by itself.

I posted my Tea for Two a few weeks ago and it's filled with drum fills with me playing around the fills. You can even go 4 bars with no rhythm if you know what you're doing, meaning what you're playing in the 4th bar should lead the listener back to the rhythm section coming in again. Many artists do that, but I don't hear many OMB's do it.

And, yes, I like the way he played that tune, but he is too repetitive!. Gunnar said it nicely....."it's too 'flat' and I feel that right hand sounds is played "the same way" regardless of what instrument to emulate."

Five stars to the Genos if that cha-cha is the tip of the iceberg of what that machine can do!

I'm curious. How many of you feel the same way regards "fills and breaks?" They ARE part of the presentation of a song and they do enhance that presentation when used creatively.