Watch it with calling people who are 65 elderly. 65 is the new 55. (Don't tell Congress!) Having had open hear surgery, and being diagnosed with AFIB the night before that surgery (thank goodness, I don't have to take blood thinners because they found it just in time) I'm a prime candidate for this. I've no illusions that it's as accurate as being hooked up in a hospital. But since I'm out and I don't have to visit my cardiologist for another five months, I like having this to just do a quick check occasionally. I know how to survey myself if that watch alerts me to something. So far, one alert since the surgery, and it was simply a blip and no need to get excited. I may not be typical. I've had nitro for over a year now and haven't had to use it once. But having this watch is going to make me worry a tiny bit less. And that's a good thing. UPS is here, my watch just arrived!