Logitech always has everything in order with this, and it shows in the form, design, and functioning of their products. After three years of using a mouse that was shipped to me from Europe, I can say that I have no complaints. The downsides are: When I went to buy a new one recently to replace the broken one, I was disappointed to find that the quality of the copy was so poor that I had to send it back to the shop. The copy had a sloppy braid at the base of the wire, a poorly glued leg, a backlash at the cover of the weight compartment, a scratch on the case near the logo, and, worst of all, no case with weights inside the box.