Difficult to assess a mouse on its ergonomics, personally I'm left-handed, my hands are medium in size and it suits me (the buttons on the sides are rather easy to access and the mouse is neither too heavy nor too light). Two kinks to my taste: the click of the dial is hard enough - scrolling is fluid against. Moreover, the yarn is a bit rigid, which bothers me a bit in the long but still acceptable. Finally, no complaints about the speed of the pointer and the rest, I have not even installed the recommended utility.