Thanks again for everyone's kind responses. I did read the introductory information, but I was interested in an opinion regarding my specific circumstance (exterior brick wall) and whether anyone had experimented with that scenario. In any event I think I am sold. Althought the price is high, I don't want to walk around with a headset on. This forum is great.
Sorry if I got a bit snippy. Not enough coffee this morning. I did do a test by going outside my house and down the street a bit, and I did not get too far before it died (maybe 40 or 50 feet from the receiver). The house is brick, but my laptop was in the front room of the house which has a lot of windows. I don't think I have any big brick walls here that don't have windows so I can't tell you much more than that.
I suspect that it will probably work if there isn't too much other stuff in your wall, but the range will be severely reduced. Whether it will still work at 30' is not certain. Also note, than when the microphone is tilted up and turns on, there can be a slight delay before it manages to reconnect. It is possible that in your scenario this time will be increased.
I have found that if I am actively tilting the microphone up and down it reconnects almost instantly, but if I don't touch the remote for a while (long enough for the backlit keys to go dark) then it fully disconnects and then takes a bit longer to reconnect. In this case, the big round light will not turn red until it has fully connected, and also Vox will not turn on automatically or adjust your master volume until the mic is fully on. Even after all of this has happened and everything is back on, I find it is best to wait 1/2 second before speaking. In reality this all happens pretty fast, and is no big deal, but may take some getting used to.