its great, I have it since 2 months, never down, only for a few minutes some times.
You need a router and an internet connection that is at least 256K or more. A cross over network cable. You connect the nfusion to one of the ports in the router via the cable. the nfusion itself is not wireless, but can connect to any wireless hub.
No usb connection.
Its very easy to set up. If you have other box, just take out the old one and install nfusion