What I can say is that sports tracking on the whole has been good on the Vantage V. But the learning curve with the watch's slightly unintuitive UI, plus incomplete software (which Polar is still rolling out updates for) can make it initially a frustrating experience. There's GPS, A-GPS and GLONASS support here, giving you almost the full gamut of global satellite support (it doesn't have Galileo support like Garmin's Fenix). But we found in comparison to the Garmin Forerunner 935 the GPS was pretty snappy and didn't wait around achingly long to pick up a signal.