@jongilman It's pretty accurate but needs some help the first few times! It looks like Apple is tuning their algorithm under the hood. The first few times I ran with just the watch was pretty inaccurate. I then I went on quite a few runs (10+) carrying both the phone and the watch. The next time I ran without the phone my distance was dead on.

@pconno3 How does the accuracy (distance/pace) of running with just the watch compare to using the watch and phone?