Project Lifesaver

This is the first time I've seen a publicly available program for persons and families where wandering is a concern. $300 is relatively inexpensive considering that most approaches involve a monthly subscription. There is some potential for abuse here, though the cost would probably reduce it...

http://goo.gl/oaxTDp 

Is there a guarantee that a person wearing a Project Lifesaver transmitter will be located?  

Client searches involve different variables and incidents are unpredictable.  In over 1,750 searches nationally, Project Lifesaver agencies have achieved a 100% success rate.  The Sheriff’s Office feels Project Lifesaver equipment and established procedures increases the likelihood of “Bringing Your Loved Ones Home” safely.