First off, if you don't follow their install instructions to the very letter, you're in for trouble. Requires lots of reboots to get it working. Second thing, the cards work well communicating to other DWL-650 cards in ADHOC mode, but will not communicate in ADHOC mode with either the Lucent Orinoco Gold card or the Cisco card. Third, could not get either of my two DWL-650 cards configured to work with the Linksys wireless router in infrastructure (AP) mode, even after verifying all configurable parameters and using the latest drivers and firmware. Finally, one of my cards heats up in the laptop and stops working -- I have to pull it out, wave it around to cool it off, then put it back in. DO NOT BUY THIS PRODUCT -- YOU WILL REGRET IT! Even though this card uses an industry standard Prism II chipset, the design around the chipset is obviously substandard.