I have an NP11 and I love it to death. The keys are noisy, but I find the action is enjoyable. It was a $128 factory refurb from some ebay music store, came with a decent x-stand, power supply and free shipping.
I guess it could be a decent controller, but it would be a bit of a hassle ... no usb/bus power, need midi interface. But it could be workable. If I didn't have my Axiom 61, then I would enlist this thing with confidence. The action is very similar.
I bought it to learn how to play ragtime/blues/boogiewoogie/stride piano (like jools holland or whatever?), because I was just sick of not knowing how to do it, and damn if I'm not now doing it
. This crappy keyboard has made me a vastly more confident player. The 6 AA battery power lasts about 6 hours. I take it everywhere ... car, deck, all around the house.