Over the several years of the service, I have one negative comment. Three years ago my father went to the grocery store and leaned over into the frozen food area and pushed the button. The agent called him back but my father is hard of hearing. If the device had a vibrate feature the misdirection of the EMTs might have been avoided. As it was, the emergency personnel responded to his house broke down my father's back door. If the agent had double checked the GPS information, the situation would have been less damaging to my relations with my father for insisting he have the protection of the Mobile Help service. I want to assume that this is a cautionary tale for training personnel in an emergency situation to avoid assuming where the clients is. Also, I wish there was an update to include a vibrating feature.