I am using it with WinXP Service Pack 2, and it communicates great with a complex serial interface to an unusual piece of electronics I have, so its very compatible with "real" serial ports, unlike some other adapters I have tried that seem to only work with modems or PDA docks.

Works great to interface with a Swim meet timing console (Colorado CTS-6) that only supports a serial interface from a very picky piece of software called Meet Manager.

Overall bad experience, product seems WAY to overpriced for the cheap piece of garbage you get for it, I would pay 5 dollars for this and be happy

The Keyspan USA-19HS is the cheapest piece of control system communication hardware that I own, and it's probably the most-used

The device I wanted to connect is a barcode scanner - which is an expensive piece of equipment.