Pros: Works perfectly with my W810i.

Cons: None

Pros: It installs right away in XP, but not as USB 2.0

Cons: Under XP SP2 and Vista the card is not recognized as USB 2.0. The *.inf driver file that comes with the CD does not contain information about the hardware, according to Windows. I have to try in Linux to see if there is something wrong with the card, but this compatibility issue is very annoying.

Pros: Picked up right away by Windows, and connected to my cell in minutes.

Cons: Don't bother installing the software that comes on the CD. The installation takes 20 minutes of sheer pain, and then the device doesn't work any more.