Side slips nothing to say, I have not noticed friction, slowing the contrary, I was very surprised by the glide and smoothness of the mouse on the kitchen worktop (admittedly this is not ideal LENDROIT).
The number of at the thumb button especially destined to the use in mmo gaming without going into extreme as some mice competition. It just also be suitable for office use.
It is against imposing enough and is not suitable for small hands. The design is nice but not very ergonomic without being unpleasant for the grip.
