Has previously Logitech G 502. A welcome improvement in the wireless variant is that the wheel is now rubberized which gives significantly better grip than the metal surface. The wheel has been fitted with spokes and is therefore not solid and as heavy as before and does not spin as long as in the unlocked position. I do not use that function but write it for awareness.
For me, the ergonomics are very good and the rubberized grooved sides are grip friendly. The clicks are precise and soft enough to not cause fatigue during intense gaming sessions. With ten programmable easy-to-access features, this is the most versatile mouse I've owned and would have been the obvious choice if I had limited myself to a gaming mouse. With many buttons, however, there is a risk of misprinting and that is why I sometimes choose another mouse for the most demanding sessions. Ffa detects the wheel light side pressure instead of pressure from above and I need to concentrate on pushing right every time and pulling off a star for it but it may be something that you can adjust to.
I would have liked a greater distance between mouse buttons 4 and 5 to reduce the risk of misprinting.
I do not notice any delay compared to threaded mice. The software is good.
Lightspeed is lighter than the threaded diton, which is welcome.
It has long cost around SEK 1500 which I think it is worth. Bought it myself for 1090 and is very satisfied. Recommended!