The repeater power in 2.4GHz band is good and stable, but wants nothing really fold in the 5 GHz band, it connects only with 6MBit (compared Fritz 1750: 900Mbit at the same outlet). The measured performance of the data transmission unfortunately confirmed this.
I have no idea why this is, even if the repeater has been installed next to the Fritz box it was so lousy.
Who does not need 5GHz but well served (and possibly it funzt better with another router brand).
Annoying: The higher frequencies in the 5 GHz band is currently not supported (channels from 100).