Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible wheel/middle click

Like many people I tend to use the middle button quite a lot to open new tabs in my web browser. If you are one of these people, look elsewhere, because the Comfort Optical Mouse 3000 is awful.It takes quite a bit of effort to actually depress the mousewheel, and when you do, it doesn't always register as a mouseclick (despite a fairly audible sound when you do so). I don't know if it's a driver issue or a hardware issue but it sporadically happens with every Comfort Optical 3000 on every PC in our company. Other Microsoft mice on the same PCs using the same drivers work fine.