Does anyone own this and how does it work?

http://www.walmart.com/catalog/product.do?product_id=8086878

Just wondering if anyone here has used it? Hard to install? Lot of lag?

I don't have that exact product, but I do have a wired connection on my Wii using a similar device. It was easy to install, you just plug it into the USB on the back of the Wii and connect a network cable (some network configuration is required unless you have a router with DHCP). Wired connections help eliminate network latency on your local network, unfortunately it will not prevent all cases of lag because other players still use wireless connections and also because of the distance between players.
 
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