the details:
Positive
+ Unit makes high-quality impression
+ Installation is very simple and DSL to 1und1 was with entering the access data immediately available
+ WLAN running in the dual-band operation noticeably faster than with the Fritz! Box
+ Transmit power in the 2.4 GHz WLAN significantly further than with the Fritz Box
Negative
- No possibility of wall mounting. Device can only be set up and is still quite large
- 1und1 IP Telephony was not set up. despite many attempts and combinations led to no success. With the same data on the Fritz Box 1und1 telephony ran straight away. Lt. But cardboard print is supposed to work exactly with this modem.
- Firmware currently available only as a beta version.
Conclusion
The device is simple yet "too new".
Probably because the problem lies. Were even begin to find information Neither Google, nor on the manufacturer's Web site, if and how the facility must be made to 1und1. For me as not useful.
Too bad for the Chinese manufacturer that he has not been tested before. For me at least this chance was gambled away and I have to again buy a Fritz Box :(