I try to run with my HRM-RUN all the time when possible to get good HR data. But the times I don't have it on, like if I forgot it or if the battery runs out, I don't want the OHR to be used by default. I just want the OHR to be used when resting, walking and sleeping. The data I get from the OHR when running or cycling is complete rubbish. I have a normal wrist, wear it normally, and the sensor isn't obscured by hair. It simply doesn't bear any resemblance to my actual HR and doesn't show any patterns with elevation gain like it should do. As a result, many of my Strava activities with the OHR are filled with useless data which I can't remove, which annoys me, because no data is better than bad data. I sometimes like to compare efforts from different activities or segment attempts and it makes it confusing to know which is good HR data from the chest strap and which is bad (from the OHR). There doesn't seem to be a way of deleting bad HR data from within Strava (although I think you can make it private?).