WiFi router to replace ac WiFi Box

I bought this router WiFi ac to replace the anemic box SFR WiFi from my Fibre. It's a shame to be limited by its speed WiFi (300 Mb / s fiber and 10Mb / s at best WiFi, 2Mb / s as soon as you move away from the box).

Once configured (not very difficult, but not easy with no network knowledge) everything works perfectly. However, there are tutorials on the Internet to configure it properly behind a box: [Google: r7000 tutorial box pc inpact]
An important point if you have configuration difficulties, the default router has an IP address 10.0.0.1 (this is written nowhere in the doc).

All of my devices are connected via LAN or WiFi on the router and Box only supports the SFR TV box.
WiFi dual band (2.4GHz and 5GHz) is very very fast! 100 Mb / s on a iPhone 5S and 50Mb / s on an iPad 3.
I'm looking forward to testing with an iPhone 6 higher the rate offered by WiFi ac.

In summary a purchase I am very satisfied because now I am no longer dependent on the operators box, I have my own WiFi router on top of technology and that will take time to be outdated.