Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Nice mouse design, bad reliability

I purchased this mouse about 2 years ago. After 9 months, the left mouse button stopped working. The only way to get it to work was press especially hard, and even then it didn't work. I went to Microsoft, and got another mouse sent to me for free after a week or so.Now on my second mouse, I'm having the same problems again. I'm waiting for my 3rd mouse to come in the mail. The design on this mouse is excellent, and I love the scroll wheel among other features. But because of the reliability concerns about the left mouse button (in especially short periods of time, too!), I would highly recommend NOT buying this mouse. Get a more reliable one and save yourself this hassle.