Ian, the only negative (more like a wish list) is that Nord (Clavia) should have made an affordable set of footpedals to go with it, perhaps in 13,17,20,25 pedal models. I use the Roland PK7a which is well made and works flawlessly with the C1 BUT....it's expensive, $1295.00 (maybe I should have gotten Fran to buy it for me), and the expression pedal is so high off the floor that it forces you to have your bench (and consequently the organ) very, very high in order to have enough of an angle to bring the expression pedal to it's lowest setting. BTW, this is where that OnStage KS7150 comes in handy - the higher you extend it, the more stable (wider stance) it becomes. However, if Nord produced it, it would probably be just as expensive as the Roland, maybe more, but probably lighter (the PK7a is 1 lb. heavier than the organ itself).
When you demo it, take your time, explore all the scenarios, and then post an honest evaluation, good or bad.
chas
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"Faith means not wanting to know what is true." [Nietzsche]