I just got one 2 weeks back. It works pretty well for reading messages, if you feel the notification. The watch vibrates to indicate that something wants your attention, but that can be easy to miss in my experience.
I don't use the music controls often, because I listen to podcasts mostly, there I don't have to switch track often, but the experiences I made, it worked well.
The watch sometimes drops connection tho. Usually once or twice a day. But it is easy to reconnect.
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