So having used a Billion wired router for a few years, this was my first time installing a wireless network. I wanted to keep the existing router in my office and simply add a wireless system for the rest of the house - I was assured this would do it.
Wow does it! I was a bit concerned beforehand about setting it up, but it's extremely easy - just plug in and it all works (ah if only everything windows-related was like that). So now I have a very fast wireless network (now secured, as I followed Billion's instructions ;) ) added to my wired network which can be accessed from anywhere in the house on the laptop. Also as its 'N' is noticeably faster than B/G networks which can seem to crawl along.
If you want a quality, fast wireless addition to your broadband - and using the existing power cables in your house which is quite cool in itself - you've just found it!