Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Working flawlessly for 4+ years

I purchased this to use with my Mac because I wanted the extra button and the scroll wheel and it was so low priced. I have been totally happy with it. The finish is wearing on the buttons from finger contact, but the functionality is as good as new.I also love the Mouseworks software that works with this mouse. It can be set to move the cursor fast with quick movements and slowly with slow movements. Big help for large monitors.