We have been running the Netgear R6300 and the Netgear A6200 WiFi Adapter about a month now

Comcast is our ISP, and our home network combines;
4 wired windows 7 units
1 wifi windows 7 machine with (the old netgear Wireless n300 adapter card)
1 wifi windows 8 Acer tablet, dual screen (45" Samsung HDTV as second monitor), with the Netgear A6200 Adapter

the wired LAN gives us data transfer speeds of up 120MBps PC to PC
the Netgear A6200 (connects at a consistent 866mbps) and data transfers upto 35-50MBps
the old wifi (connects at the 300mbps) and data transfers reflect it 11-12MBps

Note:
the R6300 router is locate on our main floor, and the wireless units are in our basement, the A6200 adapter dropped to 577mbps when I moved it to another area of the house, which made the signal go through 2 brick walls and 2 other walls, at about 40 ft.

it is a sweet combo, things can run pretty much straight out of the box,
however, on close inspection some of the router options needed changing, while it appeared everything worked fine, some websites with live webcams, the webcams would not show, but normal videos, etc, continued to function.

We didn't install the Netgear Genies on the machines, though you could, we just installed the drivers, and let windows handle the rest.

here are the R6300 router options we changed to make it all work
to get max a/c rate for the A6200 adapter

you need to
1) use the WPA2-PSK[AES] settings

Setup > Wireless Setup > select WPA2-PSK[AES]
set mode : Up to 1300 Mbps

then
2) you need to insure WMM is enabled

Setup>Qos Setup> check the Enable WMM (WiFi multimedia) settings and Apply
* with this unchecked we only got a 54mbps connection

then we
3) though not essential, but may increase through put rate a little
we set RIP direction and version

Setup > LAN Setup >
RIP Direction [BOTH]
RIP Version [RIP_M2]

4) when connecting you need to make sure to connect to the 5GHz a/n/ac Network

Other router settings I changed

to ensure live webcam feeds worked
1) we had to disable a 2.4GHz setting

Advanced Setup > Wireless Settings > uncheck Enable 20/40Hz Coexistence

though they warn against it, they also state with it checked your 2.4GHz speed could be hindered

for whatever reason it just seemed to interfere with our 5.0GHz stream

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That was it....

Hope this wasn't too wordy, I am so glad we got this

good luck

Forum Discussion

My A6200 with R6300 setup guide windows 7 & 8