I have one and I have to say that I don’t think it’s worth it. It’s really mainly a notification device and a slight activity tracker. It sends you notifications from you phone but you cannot type a message back (only dictate/send voice clip) or choose from canned asnwers like yes/no/ok. If you’re in a place where you can’t talk then you can’t respond back to most messages. I find my watch just causing me to pick up my phone. I’d call it an activity tracker and not a fitness watch. It does steps and estimates your “move” (calories burned through excercise), Exercise (minutes) and Stand (hours where you stood at least 1 hr). It does NOT do true GPS tracking. I”m a runner and I thought it might be a good substitute for my GPS watch. The Apple Watch requires your phone to do true GPS and even then does not provide a map of your workouts like a GPS watch or phone app would. If you dn’t take your phone it can still work but I”ve found it to drastically overestimate my pace and distance. I have a garmin GPS watch that is much more well suited to running. Garmin makes devices for other activities as well.
Also remember it doesn’t do much without the phone. So if your phone doesn’t have a good signal or you don’t have your phone you are left with a watch/activity tracker and that’s about it.
The Apple Watch has a lot of potential but it’s not there yet.