Pros below: Form, design, functionality - Logitech always has everything in order with this. I have been using such a mouse sent from Europe for three years, I am completely satisfied with everything. With its cons: Recently I wanted to buy the same one to replace the old one, but I had to return it back to the store, because. the quality of this copy turned out to be terrible - a disheveled braid at the base of the wire, a poorly glued one of the legs, a backlash at the cover of the weight compartment, a scratch on the case near the logo, and the most unpleasant thing - after unpacking, there was no case with weights in the box!