@Thlcd
great comparison. I also have noticed that the last update, although full of bugs and battery eating, greatly improved the wrist HR on the Race S.
Previously I only used the HR chest strap, but after reading comments here I gave it a chance for walking and body building – for biking the watch is on the handlebar, so I need the strap.
Well, after a few tries, I have to say that finally it seems that it works well!