I am a customer Numericable Belgium (brief is like Numericable France) and I celebrated the INPO. WiFi in the Box is rotten, only N standard and only 2.4 Ghz band in Brussels extremely saturated. So I decided to buy this router standard N + AC and especially dual-band (with the 5 Ghz too).
So I parametered IREL in modality "bridge" and I have cascaded this router: it works nickel! Now the band of 5 Ghz I have a true 100 Mbps connection when before I had 30-40 Mbps WiFi and never again.