I love everything about this mouse. I originally bought it for my surface pro 3 then bought another one for my desktop (I did need a bluetooth dongle) because I liked it so much. The weight is nice because it keeps the mouse in place. I use this a lot for CAD and CFD post processing and the middle button (pressing down on the scroll wheel) is great for this use.
The trackball has always been my favorite pointing device and I have never had a wireless one until now. The Logitech m570 is the coolest one yet. With forward and back buttons , wheel scrolling and thumb ball all at my finger tips its quite a pleasure. And dealing with Overstock was a pleasure.
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