My 5Ghz-clients are: Sony 4K TV, iPhone 6 Plus, Xbox One, Chromecast.
ISP is the swedish Telia and I have their recommended ASDL-modem.
There are other routers in the neighborhood, but no 5Ghz ones as far as I can tell.
The V1.09 beta solved many of my problems. 5Ghz is working now and lots of other problems were also solved. This seem to be a good FW. :-)
I did have a slight issue this morning thou. When I woke up the net was frozen and I had to reboot the router. Could be a one-off thou, so we'll se tomorrow.