After WLAN no resonable transmission rates were possible (DSL speed has greatly fluctuated, with different devices - and "yes", which also depends on the WLAN or the interaction between wireless and router, I know that even from the office) is now the attempt via Powerline. Of course, the results depend on a number of local factors. Result: everything works properly and with the Powerline connection to the router there no problems with DSL more.
In the LAN (NAS access) to reach ordinary transfer rates with a stable connection.
The box, however, are very clunky. This is of course in principle to the "loop-through" outlets. I would have needed only one place (the adapter gibts even without), but the set is much cheaper than 1x adapter socket and 1x adapter without.