I opted for the product from AVM, after I made no convincing experience with powerline adapters from another provider in the past. The starter of AVM I have combined with the 2 still functioning devices of the third party of 200MBit class. The connection worked without any problems. 1. The devices of AVM Sets connect as described (in the power outlet, connect the LAN cable ready. (Press little buttons) 2. Add the Fremdgräte for guidance. Result: Everything is going well and at a faster rate than before (of course, not with 500 MBit, because they are only a theoretical value.) Anyway, I'm perfectly happy. Therefore 5 stars.