I have one which was purchased primarily for when backpacking in Scotland. Use it at the end of each day to send a message to family members. It is a pre prepared message saying that I have finished walking and am camped up for the night. It also gives them my co-ordinates so they know where I am. Never bothered with the tracking function and fortunately never needed the SOS function. See the main benefit being to reassure family members. If, after trying it, you do decide to cancel your subscription, do it at least a month before it is due or they will hit you for another year's subscription.