For me as a for me as a Ketron KB/MidJay etc,.. player having used on them stage with so many models in the past thru the years and never had a technical problem. That said the SD7 has for the pro player OMB so many kool usable features to really mix it up on stage in so many ways going for it vs Yamaha, not so much vs
Korg Pa's......
This is where the SD7's power lies. It's versatility is it's calling card for the performer in a compact all in one loaded package.

http://www.ketron.it/index.php/?option=com_content&view=article&id=588&Itemid=20

Like the advisement says.......
"It's more than just another Arranger Keyboard...
It's more than just another Player...

It's the Musician's Entertainment Tool"