Hi Goz! I have a Yamaha S80 which has a good piano sound and a great feeling keybed but I can't lift the 57# weight anymore. I also have a Yamaha Motif ES which has a decent piano sound but unweighted keybed. The PX5S piano is better sounding then either of the Yamaha sounds, and they keyboard feels pretty good but (to me) not as good as the Yamaha. Still, I am very comfortable with the action and I think I will learn to play a bit lighter using this board. I would definatly suggest you play one of you get the opportunity, as I think it is a very good value for a light weight instrument. I always run my keyboards and Ventilator in stereo, either with 2 Mackies, or my Motion Sound stereo keyboard amp (KP200S). The odd thing is, my Yamaha pianos sound bad thru the Motion Sound but the PX5S actually sounds good. The PX5S piano sounds great thru my Haufler studio monitors as you can really hear the nuance of the string resonance with those speakers. If you're on Facebook, check there for the new Casio Privia PX5S page, there's some good info and video/audio. I'm one of the members, so look for me there and feel free to send me a friend request if you want to connect. Don