I've been playing/gigging on a Yamaha p120s for several years now. Though, I love the feel of the action and the incredible sound of the piano which I believe is better than the Motif piano, I've had to constantly replace keys. The repair shop tells me that the way Yamaha designed the keys, if any sideways pressure is put on the key (like doing glissandos), then the key will eventually break.

I can't be the only piano player in the world that does the occasional glissando am I? I'm not a hard player either.

Anyone else experience this problem with Yamaha hammer action, or do I just own a lemon?

Why hasn't Yamaha changed the design so that their pianos can be played like pianos?