I have been using this mouse for almost two weeks and am very glad I made the purchase. My previous mouse was the Logitec G502 Hero, which is also a phenomenal mouse. The G502 Hero is a much cheaper alternative, but it is wired. The G502 Lightspeed has the same great sensor, but it has a few more buttons and is just a little heavier.That being said, there was a small break-in period for me while using the mouse. For the first few days, it felt too uncontrollable. You'd be surprised how much of an impact a wire will cause on your mouse's feel. The drag of the wire being gone was alone a big thing to get used to. This mouse is also lighter which added to the feeling. After a week of daily usage, it feels MUCH better, even better than my last mouse.This mouse also has fewer buttons than the G502, but sometimes less is more! It has the primary buttons you need for FPS games.PROS: - Easy setup. Just install Logitech G Hub for customization. - Great battery life with very quick charging. - Great for large hands using claw grip.CONS: - Price - Fewer buttons than G502 but you won't miss them after the break-in period - Small break-in period if moving from heavier mice.Overall solid mouse. 10/10 overall, but only getting a 4 star in the Ergonomic category since the stock pads are not as good as aftermarket alternatives, but they are still very usable.