The sleep data is useful for fine tuning sleep. For whatever reason I don't see the big effects of alcohol that others mention, but I do see the effect of late

The sleep data is useful for fine tuning sleep. For whatever reason I don't see the big effects of alcohol that others mention, but I do see the effect of late day caffeine and also of stress. The readiness / stress stuff is useful as well. Its better at picking up physical stress ( increased running volume, etc ) than mental stress, but its a useful feedback mechanism. I'd love to be able to set alerts on specific measurements. Sometimes I feel like specific measurements are very predictive for me, but the rolled up score isn't as useful. It's also able to tell if I'm getting sick a bit before I can tell.