I wanted the TP-Link use as a repeater for the Speedport 700V. In the beginning everything looked promising success. Clean the installation CD, ran went to the enclosed LAN cable and from. The Quick Setup Wizard has been "successful configuration" terminated. Initially the tub ran perfectly, but then it came to Verbingungsabbrüchen and re-connect was not possible. Even after days of tasting I could not find suitable settings. My conclusion: It's quite possible that the TP-Link with other routers doing well but with the Speedport W700V it is incompatible.
Ps: I have now bought a Speedport W500V and configure it as a repeater and lo and behold: it works.