The "German" firmware is a little tired, so we replaced them equal by clearly recent "English", but also stay a few minor points open - for example, went Portforwarding to two different computers with the same destination port is not, took the manufacturers support such but errors and answered after a few weeks with a beta firmware, in which the problem has been fixed. Up to this point this is to some extent a "bleating at a high level" and a very good support.
What I unfortunately had a negative regurgitates, is the IPv6 support is not available, neither "available" nor "on the roadmap". Lt. This device is vendor support will also not support IPv6, but only one not yet available successor device.
This is especially a pity, because offering alternative firmwares IPv6 principle; these can only be used as a rather pretty bad as well. With DD-WRT has been forgotten, IPv6 install the firmware image with ("actually" it should be possible, but the kernel can not do, and there is no half of userspace tools), in OpenWRT firmware is on the device already in a pure IPv4 Operating under load rather unstable.
Too bad: the "ultimate wireless router" you can replace again in half a year. Currently but you get a very stable IPv4 wireless router that also does what he should do, and thus is quite recommendable for small money.