the right button is too sensitive, just by resting my hand on the mouse I make clicks by mistake, it should be ergonomic, having to rest my hand in an unnatural position just to not click by mistake is really problematic. I just replaced my MX Master 3 because of a problem with the left click not holding (just after 1 year) but other than that it was perfect. What a terrible product, I think I will be returning it.