For a long time I used a Logitech mouse, m170 and other old models, but when I seriously thought about games, I needed something more accurate. And yes, size matters. This mouse is probably the only gaming mouse that does not exceed 10cm in length. m170 was too light, but this one is just perfect. Two batteries give the necessary weight. Someone said that the right button cuts the finger - complete nonsense. An hour "rub finger" - everything is in order :D All in all, if you want a mouse with no frills, great feel, small and nice to the touch, the Razer Atheris is your choice. The only similar model is perhaps from the Corsairs, but there the shape is slightly different, and it is 115mm in length. I needed a mouse the size of the m170