First time at the gym and it worked great. Put phone on airplane mode, started pandora on watch and as soon as cellular connected in the gym, I had music and station choices. Interestingly battery life better with Pandora vs. apple music. Typically 1 hour workout took 20% religiously. I was at 15% today and did a little longer, so that's encouraging. Also odd is that it's a free account and no ads played over an hours' time.
I do like the song selections better on Pandora v. Apple Music so really happy to have this option. Now if spotify would get off their behinds and do the same that would be amazing but not holding breath on that one.