Im using this calculator from more than 6 months. And the quality of keys is pretty awesome and they do not make sound when pressed.
Before using this calculate I was using another brands calculators and many problems I faced like undurability & fingers slip when using.
But the CASIO MJ calculator is very easy to use and it is durable.
It has longer-lasting battery & it supports solar charging as well.
Thats bcoz im gonna show a thumbs up to it??.