Sounds like he not a fan of the Genos sound, so it's a good thing there are plenty of other choices out there.

As far as the keyboard just freezing on the gig, it makes me think what would I do in that situation? Do you carry a backup KB? Could you get through a gig on just your phone/tablet or laptop and DJ/sing? Could you make the best with an unfamiliar keyboard that has is at the venue?
Do you have anything in your contracts regarding equipment failure? Things to think about....