I tried the manual configuration, it is not very difficult and it works well.
The main problem I find is that the signal has the same name (SSID) as the original signal. It becomes impossible to know what it is connected (to housing or live BOX). No problem if it works but sometimes now I'm connected and no internet and sometimes it works well.
So I prefer to extend coverage to use another system which is the CPL with wifi issue. You plug a CPL taken on the box and the other plug where you want it and in addition to providing a network jack outputs a signed wifi that can configure and becomes independent of the wireless signal of the Box.
Updated: following the comments below I change my opinion slightly on the product as it is possible to change the name (SSID) of the repeated signal. We must delve into the configuration web page (do not hesitate to download the complete documentation on the manufacturer's site) and therefore we can change everything and that's good. So one more star on the product.