SPOT costs $150 a year for basic tracking. You have to pay more than $150 a year if you want it to work for more than 24 hours at a time, they figured out they could charge for this because so many people complained about the previous version having this limitation.

I think for a short tour it wouldn't be worth it, but it would be nice for a long tour.

I edited because they don't have the $100 service plan any more, just basic tracking