I am pleased to report that I have not ever had an emergency necessitating my use of my Mobile Help device. HOWEVER, the freedom and security that having the Mobile Help pedant around my neck, in case I might have an emergency, is priceless! I believe that the most unique and valuable service of Mobile Help, vs. other personal security devices, is the portable 'base" that allows me to have the same security away from home as the security within my own home property. I was recently on a small weekend trip with my husband and another couple. While shopping in an unfamiliar outlet mall with my friend pushing me in my wheelchair, we rolled over a brick in the walkway outside some stores, that caused my chair, with me sitting in it, to lunge forward very quickly. Thankfully, I was able to catch myself with my one "good" hand , on the arm of the chair, and my friend was able to stop the momentum of the chair, so I was fine, but the knowledge that I had the security of Mobile Help, had I actually fallen out of my wheelchair, was priceless.! I will never be without the security that having the Mobile Help device around my neck offers me, at any time!