I had no issues losing music into it, I use Google play music and just downloaded songs onto my computer then transferred them to the watch (more detailed directions on Garmin or various YouTube videos)

I would not buy again unless they offer a decent music app on the watch.

I enjoy listening music during my running while it is necessary to load a new music in mp3 format

There is also very limited music apps it actually supports.

: At first I was unsure about whether I liked the 3 Music better than the Vivoactive 3, as I actually preferred the look of the metal bezel on the 3.

So I'll clarify: there are no *USEFUL* music apps

The music is fun to have so that you

The heart rate sensor on the back of the face is pretty accurate, I love storing music on my watch and using while I run, so I don't have to carry my phone with me at all