Just finished the Avy1 class. Those with the Barryvox generally outperformed everyone else (especially on multiple burials). So easy to use that right out of the box anyone with common sense can find beacons. With a little practice, you can feel fairly proficient in your beacon finding skills. OK it is a little more pricey than the others, but I have no regrets spending a little more on something that if I ever do have to use it, I know that when seconds count, I have the best equipment available to find my buddy or wife.