if you don't mind the wire tether. I have actually been using this model for more than 5 years and just got another one for another machine. Reduces strain on wrist placing it in a natural postion when using. Very configurable via the evoluent mouse manager application, I like having at my thumb a quick click for forward or backward in browsers, file managers, etc. And the speed control only another finger away. 6 buttons plus 4 secondary buttons in combination with the 6th, and can customise the buttons for specific applications if wanted.