+1 for the PLB with the on-board GPS.

As I'm sure you know, the two cost almost exactly the same, so cost isn't an issue.

When I carry my PLB (the older, slightly fatter ACR AeroFix with the TerraFix connector - long story) I carry it for its rescue capability.

I don't feel a need to check-in or be tracked. As a matter of fact I don't like that thought at all. As long as I'm carrying the PLB my family and friends know I'll bet help when/if I need it.

From a design perspective I like knowing that the PLB is designed to be tough as nails and that it treats battery life as if it were gold ... as if my life depended on it (and it would, if needed).

Ken K.