HRM ring

LouSmorals

I think I know the answer but I'll throw it out there. I'm doing a half marathon in Feb and use a run-walk-run approach for anything over 10K (this keeps my HR nicely in Z2-low Z3). To do this, I have a watch with an interval timer and, for training purposes, wear my Garmin 310XT and Ant+ HRM strap. However, for the race, I'm not wearing 2 watches and will leave the Garmin at home. I'd wear a HRM ring because I'd like to have the HR data, but if the data is unreliable then never mind. Anyone found one of these devices that actually works well?