Summary: I used this router for over 8 years with no problems. I also purchased one for my mother-in-law about 8 years ago and she is still using it with no problems. I recently replaced the router, because I needed a router that supports N and parental controls. I am kinda sad to see it go, because it has a nearly perfect form factor, easy and useful web interface, and is extremely reliable.
Summary: I've recently had the opportunity to set up two wireless networks for my friend's and now my home, all on WinXP systems. For my friend, I picked up a Buffalo Airstation on advice of the head of the tech department (not the floor salesguy) at a computer retailer, and it installed flawlessly in minutes, including a firewall, valuable 128-bit WEP security, plus --what is even more important to me to prevent hacking-- MAC filtering.
Summary: Setup is a snap but read the manual, the connect and power up sequence is important. I have set up two of these units; mine linked up with my cable modem automatically without a hitch, my b-i-l's needed about 5 internet addresses entered in and then it linked right up. I suggest getting the router & modem linked up and talking to each other before turning on the encryption though.