Add me to the chorus of "it sucks for running." And I say that as a fan of the Apple Watch for other (non-running) stuff. I've been running with it daily since series 2 was released. Main drawbacks for me are:
1. Display is not always on, and can be difficult to activate, which means I'm looking at my watch for longer than I should instead of watching where I'm going.
2. No physical button for pause. Instead have to activate screen and screw with it and whoops the stoplight has already changed.
3. When wearing long sleeves, seems fairly easy to inadvertently activate random stuff on the watch (by mimicking touches I assume).
4. I haven't been able to find a running app for the watch that works for me. The Nike one is utter crap, and the others also don't show me what I'm interested in (pace, distance, hr).
As a result, I no longer bother trying to track my runs with the Apple watch 2. I do run with it, but only to get notifications/texts/calls/etc from my phone. For tracking my runs, I stick with my Garmin 620, which is way more reliable (at least until the battery gets wonky and needs to be replaced). So yes, I run with two watches and no, it's not the best look.