I've owned Logitech products for years and have always been very happy. This mouse is no exception. All in all it's a great mouse, built well, look good.....
However there are a few things I want to point out.
First the mouse wheel is metal with no rubber "Grip" like my last 2 mice. This makes scrolling the wheel a bit uncomfortable and it FEELS like it's imprecise.
The second thing is based on a comparison to my old Logitech MX Master which was a bit larger with a better surface for resting your hand. With the MX your hand could simply rest on the mouse, supporting it almost entirely with little effort. With the G502 it's narrower and more "humped" so that I am forced to GRIP it the whole time and after just a bit my hand gets sore and cramped.