Negative Positive
Title: Has a GIANT cord with GIANT hockey puck at the end. Not a "unifying" compatible mouse.
Review: This "cordless" mouse has a gigantic cord, one end of which plugs into your USB port, the other end of which is attached to a hockey puck sized receiver. Other Logitech products use what they call a "unifying" receiver, which is this tiny little nub that plugs into your USB port and through which you can connect up to 5 different Logitech devices. This "cordless" mouse is NOT compatible with the unifying receiver, so if you have another "unifying" compatible product you will still need an extra USB port for this mouse. Want to use a trackball style mouse with a unifying receiver? They are rumored to exist, but I can't find hide nor hair of them on Logitech's website. There is NO trackball style mouse with a non-thumb controlled ball that is compatible with the unifying receiver. You are stuck with the giant cord and hockey puck for your "cordless" mouse.
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