Fourth, I have now had two SPOT-2 devices COMPLETELY FAIL while on hiking trips, one in May2011 and the other in Oct2011. The GPS chip stopped working, and the devices were dead-weight. In both cases SPOT replaced the unit. However, this level of reliability is a huge problem. This is one reason I think it's critical that the home-base knows that an absence of messages does not necessarily mean there is a problem. I'm still a fan of the SPOT concept and functional design. However, the reliability problems I've had make me eager to see some other company offer a competitive product.
while im sure there are PLBs that are duds … and that those dont get reported as much due to the "use only when shiet happens"
IMO this level of failure is not acceptable at all … even if SPOT replaces the unit, if something happens on the trip, yr up the creek with no paddle …