I use the repeater as a LAN bridge, because where I want to spread Wi-Fi, comes already sufficient signal strength via WLAN of the Fritz box in the cellar. For setting up the LAN bridge you have to just once to access the surface.
The only real gripe: The repeater can only extend a network. But every new Fritz box next to its own network and guest access. You can not extend both. Since its own network is more important, the guests must now halt in the cellar with their smartphones, if you want the wireless ;-) You see, that makes no sense, so that a just remains is trusted friends the WLAN key from the main network to give. Too bad, here AVM should still rework. A second repeater would do well also. I habs not tried it yet, but you'd have to also isolated repeaten only the guest network.