I bought one of these to use with the Belkin ADSL modem/router, and now it's up and running, it does the job well. It was easy to install, and immediately found not only my own wireless network but also those of my neighbours!
The only problem I had with it was getting it to work with the security encryption with the router, but now that this problem is fixed, I'm well pleased.
The card itself looks fine. It protrudes a fair way out of the PCMCIA slot which doesn't bother me, but it might bother you. It's got two lights on it - one to show that the radio link is enabled and another which comes on when data is being transferred.
Seems to be a solid and reliable card so far.