I don't recall the model at the moment. We're using it to connect our Panasonic TV to the network (as a bridge). It seems Ok, but I'm not sure it's terribly happy with our older 802.11g stuff. I'm also using one of the older things as a wireless bridge and the 300N seems to drop out when it's not used. Power cycling it fixes the problem quickly. It can run some open-source firmware, but I haven't tried it. Eventually I'll move everything to 802.11n - probably when gigabit wireless is old-hat...
We're using 5GHz Panasonic wireless phones, so I think our network is 2.4 GHz. I think the Buffalo uses the 2.4 GHz. The phones don't seem to have any issues.
I can get you more info later if you want it.
Lots of this stuff seems to be black-magic - still - due to various types of interference and variations in implementations in PCs. Unfortunately.
How's that for a useless answer. ;-)
Cheers,
Scott.