Great key action; solid, responsive, great weight and feel, mechanically very quiet. I tried every digital piano I could find for $1,000 or less and I liked the PX-S1000 the best by a wide margin. Very nice acoustic piano sounds, too. I bought it for home use - practicing piano through the internal speakers and as a midi keyboard for my DAW. If I was still a working musician I would have bought the S3000, but for my needs, the S1000 is just right. The SP-34 3-pedal unit will be my next purchase.