Pros: -Back and forward buttons -Curved space for your thumb -Fits into my hand very nicely, but I have abnormally small hands for an adult -Nice traction on the middle wheel -Storage compartment for the dongle when not in use -On/off switch -Little plastic tab that goes under the batteries for ease of taking them out -Batteries last ~6 months with the mouse on, but idle for most of the time -Wireless -Works on many surfaces

Cons: -The plastic cover on the left and right buttons occasionally get caught on things and lifts up to where I think it will break if I move it the wrong way. Simply pushing it down will fix it. -When the mouse gets accidentally dropped, the batteries force the cap of the battery compartment out at an odd angle. You must be very careful when you try to push the cap back in place, or you will break it. -The middle click function isn't very responsive. -Doesn't work well on bumpy surfaces, like quilts, but who expects it to? -The dongle is NOT for keeping in a usb drive of a laptop. When I left it in my laptop to carry to class in a backpack, the dongle snapped. It was a very sad day.

Overall Review: -You can't mix and match the dongles and mice of the same model. -It only works on three of my four usb ports. Not sure why, but I'm too lazy to try to figure it out since it works on the other three ports. (Other usb devices work on that port, so the port's not dead)