I recently purchased a couple of the Sombra Labs receivers, and can say without reservation that they are the best I've seen in over forty years of R/C model activity. They are really small, have the user option of activating the fail safe, will work on any FM frequency, and have only one major weakness. They seem to be very picky about having only a five volt input. They tend to get a little unstable at six volts, or any voltage that exceeds five volts by very much, in my experience.
I ordered them directly from Sombra Labs, in Canada. They are a real bargin, and I will probably buy a couple more of them, particularly with the trend towards gigahertz frequencies, which could make support for 75mhz tend to drop off in the future.
"The Japanese solders would die for the Emperor, which made them formidable. The U.S. Marines would die for each other, which made them invinceable"...Iwo Jima