I purchased one last year for our trip up to Alaska and down to Mexico.
I have never used it, and in hind sight wished I had used that money
to buy a PACTOR III modem for my SSB radio. You can recieve the same
info/emails via the pactor modem that you would with the iridium data
connection.

If your thought is that you would call someone if you got in trouble,
the nearest help to you is going to be contacted by radio no by a phone
call.