They are very heavy and realistically best suited for a studio. They were also very well made and designed to be used on the road...the tuning tended to be more stable than a regular acoustic...the bottom octave was difficult to tune. A friend of mine had a CP-70B (73 key) and moved it from gig to gig, and he said the tuning usually needed only a little touch-up depending on the weather and conditions at the venue...he carried a tuning hammer with him and a strobe-tuner.

The action is basically the same as a grand piano, being that the strings are struck from below.

I liked playing them, but I never owned one. Tony Banks, in Genesis, was also a user.

Ian