The M2 works better, esp. over distance. My good buddy has a Tracker and we practice from time to time and both find the Tracker easier to use but the M2 more accurate and quicker to pick up the signal over distance. Just plain better once you get the hang of it.
In fact we are getting together tonight for grilled steaks, ski movies and transceiver practice. Want to come over?
I have not tried the Barryvox. I like the M2 because I bought one. My friend still likes his Tracker cause he bought one. I think that they all operate within a narrow spectrum which is acceptable and that practice will increase efficiency. The point is not to use them, avoidance is the operating principle...
Goat