The update is awesome how it shares so many data points with the health app. I have it sharing steps, weight (i have their scale), BMI, fat%, heart rate (user their checker in the app), and soon to be blood pressure when i get my Bluetooth monitor tomorrow!
Also note that if you enable step tracking sync with health and you already sync to health with another app, it will duplicate your data, meaning that it will double the actual amount of steps you have actually took.
This is happening to me except it looks like my 5s is tracking my steps with the built in support of the M7. I can delete the data in the Health app, but it starts tracking again. Anybody experiencing this/got a fix? I was trying to find somewhere to disable it. Also it seems like Health Mate is duplicating it's own data sometimes...i'll see two or three entries in Health for the same or relatively similar amount of whatever it is for the same day.