Pros: Works great, bought it for a customer and they say it's a huge improvement over their previous optical mouse. I used it when setting their computer up and it was very nice to use, didn't feel "cheap", great mouse for budget builds or normal everyday PC users.
Cons: Doesn't fix the normal customer ID10T problem.
Pros: Good fit. Buttons are inside the side case. Convertable feature of PS/2 and USB are nice. Ease of installation. Logitech's site works very good for the product information and software download. Delivery from Newegg outstanding.