Autonomy - you put two normal AA batteries and forget for a very long time. My paw is not small - I liked the shape and ergonomics much more than the previous mouse (Razer Lachesis). There were no problems with installing drivers and software. There is a mode switcher on the bottom of the mouse - it's very convenient - you can surf calmly in the browser in economy mode, saving batteries. I wanted to play - one click and 1000Hz polling rate. IMHO, in general, I advise - the model is clearly successful.