Gee, Diki, it's not the end of the world...you must slow down a little...take a break...have a cuppa tea.
I choose my gear because I like it...no hidden Yamaha promotion stuff, no secret agenda.
I happen to like the action of the PSR-900 more than the Tyros2's action...so sue me.
You like your keyboard's qualities, I like mine...why not just live and let live?
I'm a professional player...I know what suits me...I like a light fast action and I like a 5 octave keyboard...it's perfect for me.
If what I use doesn't agree with you, or you think it has an inferior action to some other keyboard, that's okay....no big deal.
Now, please....no more bubbles.
Ian