I've seen those and thought that it would suck if you forgot to charge the battery, or it died, or if you forgot to renew the subscription! I guess it's like insurance, make sure it's paid!
Better of getting the Icon under coat vest. It’s around 600 vs 400 for the Klim but there is no subscription needed. You buy it and it works. It’s otherwise a very similar product.
As regards the Klim vest, would you really want to pay that much money and then leave your safety in the hands of an App or in the control of a computer?? i think not!