I took a logitech g403 to replace the deceased, when I bought it I was pleased with the weight and grip, but my God, how wrong I was. Raising the mouse is extremely inconvenient, after a long use the hand starts to sweat a little and it just slips out of the hands when picked up, and this is wildly annoying, given that I work and play on a small sens with 800dpi. Even serifs on the sides do not help. Enough for me for 2 pm, I hope they will take it back in the store without any problems.