I really like being able to check my heart when I wish, especially if I feel like something happened, which it did one time. I had an abnormal feeling late one evening and used my Sono Health EKG to check it out. It showed an abnormality. I called my doctor and emailed him the info. (Great feature on the app) He told me to go to the emergency room where I was immediately seen and admitted for 3 days for further tests. It was determined I had a "spike" of something and that things were normal now. I showed my SonoHealth EKG machine to the doctors and staff who had never heard of anything like it. Three staff members who had heart issues themselves or in family members immediately went on line and ordered one for themselves.