Update 5/18/15:
So after the winter that would never end here in New England (and our Caribbean vacation) we finally have our railway open for the season.
While I had only a few chances to test the locomotive that I equipped with the Air Wire setup before getting it out on our own railway here is my review so far:
I certainly do like and appreciate the no track cleaning before running a train.
I am a little disappointed in the range of operation between transmitter and receiver. I have the transmitter output maxed and to the best of my knowledge when putting the shell back on the GP38 the antenna was not being trapped under other wires and was as far from the battery as I could possibly get it.
Talking with the people from AirWire at the ECLSTS they did mention motor noise from new motor blocks that had not broken in yet being a cause for poor reception along with my choice of battery I used (even though I used what was recommended by my Airwire dealer).
However, still not really a big deal to me as I mainly am a set it & forget it runner… may be a different story if I was someone who did operations (my range is maybe 20’ at best).
Anyway, the operation is pretty smooth (even though sometimes I am turning stuff on/off by accident) and I was very impressed with the run time I have seen so far. I had the GP38 pulling just 3-cars yesterday, but in the hot sun and with full sound & lights running and it went for a good 3-hours before I shut it down. I am sure it would have run longer on the same charge but we needed to catch up on 2-weeks of Game Of Thrones before the new episode aired last night!
So overall I am satisfied with it, I still want to convert my GP30 over to battery, just wish it was a little cheaper.