So, as a Paramedic of 31 years, I know how important it is to get a good EKG tracing, so sometimes we must shave the chest hair to achieve this, and so that brings me to the Apple Watch. No, I am not saying shave your chest, but as a medic who has A-fib I know how important it is for me to get a good tracing. I can tell very easily by feeling my own pulse, but I need something to show my Cardiologist. Ok, so I shave my wrist where I wear my watch, and as a result of this, I get great readings, which I have compared to our professional equipment. Just something I like to share.