I used to use Logitech's mouse, photoelectric mink hunting, mx310，g500,m325，m515， After 10 years of repair and renewal, Logitech has a good after-sales service. If you want to buy it, you can buy a 3-year warranty from Guohang, The G502 sounds like glue, but in actual use, it is found that Logitech has changed. First, it has become a cool light, which reflects Logitech's gradual access to mainstream elements, and then the feel and materials are very careful. The coverage of the two materials is very good. Besides the feel, different people have different opinions. I think it is good. Although micro movement is general (I have not used any advanced micro movement), the keys are clear, It takes a little effort.