The installation and connectivity are very simple. The operation works for 2 days so far flawless and fast. Whether the performance remains steady, one can judge after prolonged use. At first I was afraid that the Devolo dLAN adapter is not that connected the LAN signal feeds the TP dLAN adapter on the modem into the power grid, are compatible. However, without reason, because the Devolo adapters connect easily with the TP Link adapter. The VDSL modem is NetCologne. The total of 4 dLAN adapters are used primarily for connecting 13 printers to the network and partly to Internet and moderate network usage by 10 computers, which means that for this entire dataset enough bandwidth is available and even large documents can be quickly transferred to the printer even simultaneously.
Update on 18.04.2015: After nearly 1.5 months and use a new Fritz box 7490 is still nothing to complain about and everything runs smoothly.
