I bought this at the same time as my Xbox360 elite in March 2009. It did not work for me. I tried it with a netgear router then a brand new Linksys router n-class which was downwards compatible to the b & g. The only way I could connect was to wire in my xbox to my router. I could not get an answer out of Microsoft and when I tried the router companies they just blamed MS. If you can park your router near enough to wire in you should avoid buying this adapter. I am still not sure if it is the adapter or MS software in the xbox that is causing the problem I did not want to risk the money to buy another one and it was past 90 days before I tried it(my bad). If you are wondering I have setup a wireless network in my home with several computers with no problems and without reading the manuals, for this unit I read everything and downloaded all upgrades for the routers as well. Beware try it out right away and send it back if it fails for you too.-andre