My newly ordered HRM-Pro Plus will soon be arriving by mail. I plan to connect it to my Epix 2 and get started with Garmin running power. Does anybody have experience on how to set it up. I mean....should I use GPS for pace og the HMR-Pro plus pace (after auto-calibration is done)? Is there a noticeable difference in latency in example when starting a sprint? Pros and cons?