I bought this router only for two reasons: WLAN with 5GHz and more than 300Mbit / s data rates. As Mr. issues, a stroke of luck! The web interface provides exactly what you need, IPv6 works perfectly. The data throughput is in the WLAN and LAN excellent, the LAN I measure exactly 100MiB / s. I was pleasantly surprised by the QoS Where all to FritzBox models that I already had in hand (7050, 7170, 7270, 7570, 7390), with large Downloads Skype, TeamSpeak & Co is no longer enough priority (after manual configuration) had been there when WDR3600 without any configuration even at full capacity of Up & Download no complaints at SIP, Skype, TeamSpeak or real-time games.
He has a small flaw: the USB ports for printer connections are completely useless. It concerns with the software behind it namely not a print server, but a USB remote connection. The software to run only under Windows (Linux users can completely forgotten), and even there the thing works only sporadically. Remedy could create as OpenWRT, but I have not (yet) tried. It would also be a pity for the otherwise so wonderfully successful firmware.