I'm usually pretty conservative about how I rate products, but this is not something
I would recommend to anyone. The default firmware (even flashed to latest version) is horribly designed and buggy.
Under a reasonable level of network traffic it crashes, and it will sometimes just reset for no reason.
I've also loaded dd-wrt (warning: it doesn't seem that you can restore the stock firmware once you do this)
across several versions and experienced some consistent packet loss on 5Ghz bands in a client bridge setup.
Honestly, I don't know what's worse - the packet loss using dd-wrt firmware (as it doesn't completely reset but lag is bad)
or the timebomb Buffalo firmware with the horrible UI design which at any given time may just decide to turn off/on.
If you're looking for a dual-band 2.4ghz/5ghz AP/bridge/client wait for something else, or get a lower end 5ghz capable
router - suck it up and turn it into a bridge/AP.
I have not tried OpenWRT yet, but I may give it a shot when I have some free time and I'll update this review if I do.
I have tried the 2013-04-15, 2013-04-01, 2013-09-15 and 2011-06-14 builds of dd-wrt, all exemplifying packet loss
from the wifi radio in 5ghz mode. The 2013-04-01 build (see below) attributes the least packet loss of my first 12hr test (4.2%)
and so far seems somewhat usable.
== DD-WRT NOTES ==
(this one seems the most stable - you can flash directly from the web interface of the buffalo default firmware)
** make sure you erase nvram before/after
For some reason, it seemed more reliable when I flashed it again with the regular firmware here: