Summary: This was a relatively cheap replacement for another card that got damaged in a client's SOHO setup. So far the card is behaving very well: no dropped connections/packages and very decent speed.
Summary: Great for upgrading older PCs to 1Gbps specs. PCI is perfect because older PCs have them. It's not plug and play but does come with drivers for all versions of Windows. Drivers come on a CD and latest version can be downloaded from website. I've tested speed up to 800Mbps with CAT 5E and CAT 6 cables in an enterprise environment. It's not able to get to full 1Gbps but probably bottlenecked by routers and switches. You can't ask for more at this price.
Pros: Inexpensive, well supported in various Windows versions. Just works!