Beyond heart rate, I guess the bigger question is how valuable is all of this data for the average, relatively healthy, individual? There is probably some fluctuation in our daily heart rate and O2 sats, etc. that we are not even aware of, and are in all likelihood irrelevant, but this could potentially make one a little paranoid. I could see this as coming in handy in a healthcare setting, such as a nursing facility where patients are recovering while receiving physical therapy, and need to be more carefully monitored. But functionality is going to be more important in that setting than design is, and you're probably paying a bit of a premium here for design.