.The heart rate monitor is very quick at picking up a signal and communicating with the watch.I was pleased to see, not only did Garmin chose to keep the running partner they’ve improved it. You can still set your desired race time, distance or pace and race
by doing so previously) and hence do wear 2 watches when running so again can't comment on this. For what I use it for - distance, pace, and therefore continuous updates on the run - it is brilliant. Garmin Connect also adds a dimension when you can easily