Excellent
After a G502 LIGHTSPEED that was starting to show signs of fatigue after just 1 year (too complicated to send the mouse back to LDLC), I bought this one.
I'm clearly not disappointed, the grip is superb and very comfortable. It's light but not cheap, it weighs enough to be really good.
It's very pretty, with a special mention for the mouse switches, which are very good quality. The click rate they deliver is truly exceptional.
There's really nothing negative to say about this mouse (especially as they've taken into account the problem with the 502 LIGHTSPEED's charger (basically, if the charging cable supplied was out of order, you had to buy the same one, which had a shape made for this type of charger) and fixed it).