I want to preface this conclusion with this. When I first received the TEW-673GRU I had heard there were issues with it running with both bands enabled. I had heard it had limited range and that the speed on it was not good. When I ran into the connection speed issues on the 5GHz band I thought I had found these claims to be true. However, with a bit of tinkering I was able to find a channel that worked well for me.
What I think the issue is here is that most consumers do not know how to, or even that they can adjust the channels on the wireless routers. They get something, it does not work and they complain. I have to say that with a little (ten minutes) effort, I now have one of the better routers I have worked with. I am able to see traffic at a glance on the LCD. I can easily stream even HD video over my network without compromising other traffic and I get all GBe ports to connect to the rest of my GBe network; all this at only $164.99 from NewEgg.com.
There are things I would have liked to see different; like a tilting screen and a more complete wizard, but overall I cannot complain about its performance. It has and still is doing everything I have asked of it without missing a beat. It is true that it does not have the range we have seen from a few routers with a G+N only setting, but this is across the board for WiFi Radios that lump B, G and N together and not a TRENDnet issue.