My New Paperweight?

So i have been having trouble connecting my Xbox 360 to the Internet recently (stupid Comcast and the Arris all-in-one gateways - TG862).  So, i purchased something i hope will not turn into a semi-expensive paperweight.

Basically, i went out and spent a bunch of money (strangely freed up now that Microsoft decided not to price their Surface RT Tablets cheaper) on a solution that i hope is more than temporary.  i went to Office Depot and bought a Linksys wireless bridge (WES601N).  If you don't know a bridge device will allow me to plug ethernet enabled devices into the bridge and connect to the wireless network here.  i hope this will work, but there is still the underlying problem of the Comcast/Arris all-in-one.  i just wanted to trick my console into thinking it had a wired connection. 

Now if i get another ethernet cable (not easy to find at Office Depot), i can also hook up my blu-ray player.

The set-up was supposed to be push button simple (push the WPS button on the router then on the bridge).  Of course things can never go that easily for me.  i tried a couple of times unsuccessfully.  Then i just connected the wireless bridge through ethernet to my computer and entered the default address for the bridge (http://169.254.1.250) into the browser.  Eventually it worked and i could enter the rest of the information.  To my surprise, i hooked it up to my Xbox 360 (via ethernet) and it worked.  How long it works worries me a little (hopefully the next 8 months or so).  i would kind of like it not to turn into an expensive non-functioning paper-weight.