In general, despite all the pluses, I have extremely negative impressions of the Logitech G603. "Engineers" made matted plastic and beveled sidewalls - because of which you have to strain your hand hard enough to hold a heavy mouse of this shape. Playing shooters is very inconvenient, because. with each rearrangement of the mouse, it tends to fall out of the hands. And this happens even with one battery in the compartment. Who came up with the idea to repeat the G403 shape and at the same time remove the rubber or not slightly change the shape so that the ring finger has something to hold on to - I don’t understand. To sell with traces of use - to lose half the price, to use it further - it already reduces your hand . Thank you logitech for spoiling the mood and lost money.