Yes I read that about the broadcom devices and thats why this question arose.
But the general review of Netgear is that its a great device openwrt wise. Thats why I thought I would ask people using OpenWRT to see what they have to say.
I own a MR8300. It works very correctly, but don't expect wonder if you have a Gbit/s WAN. Let's say that 500 Mbit/s is a maximum for plain use.
My only advice would be to run the linksys firmware, setup wifis, and wait for half an hour before installing OpenWrt. I had troubles with the radio0 wifi at first launch: it seems that the router needs time to calibrate DFS channels. After that it works like a charm.
You can use luci advanced reboot to change boot partition.
The device has 3 wifis
2.4 GHz 300 Mbit/s
5 GHz (channels 36 to 64) 867 Mbit/s
5 GHz (channels 100 to 165) 867 Mbit/s
They all can be used simultaneously (I bought this router precisely for this purpose)
That means that the maximum link for a device is 867 Mbit/s, not the 2200 advertised. These advertisements are foolish.