Pros: Small and light form factor with USB cord. Works great for setting up a virtual lab, allowing virtual machines to have their own physical NIC when needed. USB cord is great for adding to a USB hub. Works well with Linux 32 & 64 bit os (without driver issues) as well as Windows 7 64bit (with driver install)

Cons: Not the fastest NIC, but it is USB 2.0. Works very well for light applications. Not the smallest form factor, but I still carry three of these on trips in my backpack without issue.

Pros: Works great under linux. I plugged this in to my OLPC and booted up, worked without having to touch a thing.

Cons: A little bulky, but very light