This is NOT good. Very disappointing and discouraging. I, like so many others, was rooting for the Garmin Forerunner 645. On paper it looks irresistible.
Shame that Garmin rushed it out before it was ready for prime-time.
That step count accuracy is poor is extremely damning. That is the basic, core function. IF you can’t trust that, then there is no point getting the FR645.
I am more or less sure that I will not get a FR645 anymore. Not worth the risk. Thinking of getting a Forerunner 935 which gets better reviews, on a consistent basis, and has been on the market for over a year. So, it is proven.