Instruct: Classify Amazon reviews into positive or negative sentiment
Query: what a dissapointment

the mouse worked great, for a week. i loved it (during the week it worked).then it just stopped working for no reason. if you get this mouse (and it seemed like a great mouse --when it worked) make sure you keep your receipt. my defective one may have been a fluke.. but be cautious anyways. i was very surprised becuase ive always had such great luck with logitech products.