hp 50G build quality in today's standards (2018)

[zx_spectrum]

first of all thanks for your feedback
i am really surprised about the reported keyboard quality!!!
currently i own a cheap casio fx-991ES, i know it is a cheap plastic device but even with such cheap calculator i am not encountering suck keyboard problems as keys not registering or key bouncing.
it is really shocking to me... actually according the reported feedback i am starting to make the conclusion that the quality of 50G is way lower than that of cheap casio !!!!!!!

could anyone elaborate on that ..........