usability, design, price, size, durability

89% of the reviews on Amazon.com give this product a positive rating.

Good size, great style, scroll wheel is easy to grip

Does not work well on most surfaces. My last mouse I could use my thigh, the walls, anything remotely like a solid surface worked, but this one cuts out on most things. the power button is hard to get to, a huge pain to turn off when traveling. the...

Quality look and feel ; Response is good ; Rather easy to setup and start using

Not really con's but worth mentioning ; This may sound funny :But ; No clear indication on which way to install batteries ; Slightly on the smaller side-but OK, it's for my wife and her tiny hands. :P

Was purchased for the fit and finish, known-quality name brand. Even thought it's designed for right-handed use, it was deployed to a left-handed user upon request, and still works well. Low profile dongle also works well even with the PC several feet...

Does not come in a left-handed version ( not too surprising )