Already my first G500 was a (guaranteed) replacement for its predecessor, in which the mouse wheel CA had failed 3 months.
Now the G500 strike after about 1 year of operation. I am not a gamer, but certainly a power user. A new defect: the spring of the left mouse button has been limp. In a mouse that's an indictment of the manufacturer. Let's see how long will the new. I've gotten used to the G500 and do not want to get used to a different model.
Of course, I realized that a mouse does not last forever. A mouse is a consumable item, which can be replaced as the keyboard regularly. Is but the left mouse button after about 1 year, the manufacturer has probably "too much China" installed.
Logitech and quality - Once upon a time.
Addendum: the new G500 has now failed again. Problem: left mouse button.
Conclusion: Never again Logitech.