Judy... I have the Garmin Inreach Mini...$12 month for the annual safety plan. I would stay away from SPOT, it is on Globalstar network which is just not as robust as Iridium, which Garmin uses.? A PLB is a good option if all you want is an SOS button. PLBs do not offer any two way communication and there is no ability to know if your distress message was received or not.? I think Cris does a very good job explaining the differences and how a PLB works.? Might be worth reading to help you decide:??
JP
John Powell