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I've used several of these PCI network cards to connect a Desktop PC to a wireless network.
Although this model can connect at 802.11g 54mbps and backwards (b, a), it still offers a decent speed and more importantly reliable and solid connection so long as your router has a good range.
I have found that even when the signal strength isn't the best, the Cisco Aironet card and its ariel will connect where other cheaper adapters won't.
It also has a length of cable for the ariel (which has a stand to sit on a desktop or where ever). Other cards have the ariel connected directly to the card itself and I've found that sometimes does offer the best chance of getting the strongest wireless signal.
Components and built quality, as you'd expect with Cisco, are high quality. Installation is straight forward, just a case of popping in the driver disc to install.
If you want to be sure you won't have issues connecting to your wireless network, I'd recommend this and other Cisco adapters.