Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bad design

This mouse, while cute and easy to carry, has a huge design flaw. The USB plug is hinged, and in no time at all, mine stopped working. (The design has improved since then -- a USB plug that snaps into the bottom of the mouse is very convenient, but just make sure it is one straight, solid piece, with no hinges or moving parts.) The USB plug started losing the connection sporadically within six months of my purchase and in less than a year it had failed completely. It has a three-year warranty, so I called Microsoft and they are refunding my money.