The HP33S has a positive button feel. You can feel the key is pressed down and come up again. BUT I have several experience that "positive button feels results in negative output!" I pressed a button, and nothing was seen in the screen. That might be my problem, since I'm still not familier with the awkward chevron keyboard, and occasionally I'll press a key out of its proper position (or maybe I don't really know the proper position of each key), but who else has ever used such a calculator keyboard?
I don't know whether anyone of you have also such an experience. I never have any key pressing problems with my 32sii and 42s.
KC