The shape of the mouse allows an easy grip and is also suitable for lefties. The wheel keeps its promises: Hyper accurate, it allows for ultra fast and precise scrolling. The wheel is also multidirectional, but its handling is I find less easy.
Its weight is correct, skates glide wonderfully, monitoring is laser-like but still does not work on glass. It is better to put it on the desktop or a mouse pad.
The battery life is announced for 3 years, but I admit to not having tested :-))
In summary: Medium size mouse with nano receiver, which he is best used for portable and small hands. The dial is a real plus, and the ambidextrous hand (if you, like me, left and right handed at home). Perfect for office and surfing.