I would be surprised if that device worked.

What you need is a directional antenna. Ideally, something you can put in your roof or outside your window. Something like this: http://www.amazon.com/TP-LINK-TL-ANT2409A-Directional-Antenna-connector/dp/B003CFATNS/ref=sr_1_2?ie=UTF8&qid=1407434530&sr=8-2

A larger antenna with a bunch of gain will work really well, if you can find a place to mount it: http://www.amazon.com/TL-ANT2424B-Directional-Parabolic-connector-resistant/dp/B003CFATOW/ref=sr_1_3?ie=UTF8&qid=1407434530&sr=8-3

I actually had two antennas similar to those set up at Tenside, and I got GT WiFi for about 2 years. Never had to pay for my own internet. (This wasn't stealing, I was paying my technology fees...)

Anyways, you can hook that antenna up to USB adapter (like the Alfa one linked below), or into another wifi access point and rebroadcast your own network.