This WiFi card worked straight away for me and delivers the expected performance.
I use Windows XP and am always sceptical about using included software, even if they include drivers, as they will invariably be out of date and potentially cause more problems than solutions.
With this item alarm bells rang as the user guide not only instructs you to reject the Windows Plug'n'Play installation and instead install the CD software, but details using a dedicated wireless connection setup utility; this invites problems if you subsequently have connection problems and need technical support, since you are not using standard setup...
As Windows XP already deals with network connections itself I could see no benefit to circumnavigating it....
So I installed the card then, as the PC was connected to the Internet via Ethernet to my broadband router, allowed the resulting Plug'n'Play facility to find a driver.
Within seconds the card was installed as a 'Ralink Turbo Wireless LAN Card' with a driver date in 2008.
A few seconds later, without me doing anything, my wireless broadband router was displayed as available and after inputting my Network 'key' my PC was connected to the Internet wirelessly.
The entire process took about 45 seconds - GREAT !