I researched the top ten companies for two weeks. I called and compared every detail and I found that Mobile Help offers the most AND they're the most affordable! FDA certified so they have to be held to a higher standard. Equipment is easy to use and lifetime warranty. Sales, customer service and the dispatch on the two way speaker are thorough and easy to work with. I highly recommend Lee for the sales agent...he was so patient with all of my questions. It's an amazing piece of mind to have this for my Mom and we've been recommending Mobile Help to those around us that could use it too. Thanks!