I installed the user friendly v1.79 firmware (selected Singapore from country list, although I'm actually from South Africa) on my WZR HP G300NH v1.
I haven't tried v1.76 or v1.74 of the firmware yet, so I can't say whether v1.79 of the firmware has issues with 300Mbps connectivity, or if it is just my Intel 4965AGN wifi card in my laptop that doesn't want to go any higher than 130Mbps. My guess (and from what I've read so far) is that the 4965AGN does not support channel bonding (40MHz) on 2.4GHz frequencies.
I really hoped to increase my connectivity speed from 130Mbps to 300Mbps, which didn't happen. At least the v1.79's wireless connectivity seems pretty stable so far - for the 2 hours or so that I've used it.
Other than the user friendly interface being stable and packed with multimedia features, I'm not the least bit impressed with the way you configure it OR with my throughput when comparing it with DD-WRT.
The proprietary DD-WRT firmware that you can download (with V24-SP2 build 17798 being the latest version at this moment) is really unstable when it comes to WiFi connectivity. My wireless disconnected every couple of minutes, and I had to manually reconnect. My throughput with that wasn't great either.
So far I'm the most impressed by the custom DD-WRT build (DD-WRT v24-sp2 (08/10/11) std - build 17461, which uses the ath9k driver, instead of the default/other buggy WiFi driver) that I got from the following forum post: http://forums.buffalotech.com/t5/Wireless/Best-Firmware-for-Buffalo-WZR-HP-G300NH-is-here/td-p/84203
I got very good WiFi throughput with that image (80Mbps upstream / 60Mbps downstream) and it was stable. When selecting the TX & RX antenna's as 1+2+3, the wireless status shows as 450Mbps, and I got the best results like that. Unfortunately my 4965AGN was still just stuck on 130Mbps connectivity.
I'm not using anything fancy on DD-WRT (at this moment), so I can't say much on the other packages included in that image though.
