This is the only trackball for me -- I love the configuration, which allows for my first two fingers to be used for left-click/right-click while my thumb moves the mouse. I hate the split-fingered form factor that you see on most trackballs these days (although, in defense of that config, that makes it universal so lefties can use it as well).
I had been waiting for a wireless version of this trackball since I loved the old wired version but the wire gets in the way. This also works great with my Logitech keyboard because I only need a single usb port for the receiver. Good deal at Overstock.com as well!
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