Over the past few years, defibrillator's seem popular in non-medical settings. Now a marina/club of which I am a member just purchased one, yet we only have 700 members and no one can recall a heart-related emergency. "Classes" will be offered in their use, but is it wise to allow non-medical folks the ability to jolt someone's heart, or are they no-risk due to automation ? Are these low-cost units credited with saving many lives ? Thanks in advance for the feedback.