Pros: PS/2 mouse that I wanted as it did not use up any USB ports. I plugged the mouse into the motherboard PS/2 port through an extension cable (CablesToGo #29617) and it worked great. No drivers required.
Cons: Not the best feeling mouse I have ever used; but feel is very subjective. I took off one star for the feel. I actually liked the older Microsoft IntelliMouse. However, they have gone the way of the Dodo bird.