I used a Spot Gen 3 for 6 yrs up until last 2 years. My use was for long distance hiking (I always hike alone) and it suited me well. Send a pre-recorded message "OK" or "Send Help" or "SOS". I would used it to let my contact list know where I am and that "All is OK and having fun". Family and friends could track my progress down the trial. I never had a problem connecting although in an area with a heavy tree canopy I might have to move it to a more open area with a better view of the sky. It was very basic and it was all I or wife needed to stay in touch. Nothing beats letting some responsible person know your agenda and when to contact authorities if you missed your due date. The one caveat is it takes a functioning person to activate the SOS, if your incapacitated it is useless.
