Here is a cut and paste form my comments on another forum:
I've had mine for several weeks and it is growing on me. I set up a VIP list on mail so I only see mail from key clients and a few others. Message triage has been better than I expected. A lot of times a simple YES works fine. The hands free phone feature I expected to be a gimmick but it is actually useful for when your hands are full. The information shown by configuring complications is nice. I love Apple Pay. Battery life has been a non issue. Build quality is superb and the sizes are well chosen. Easily changing bands is a great feature. Digital Touch is great but only if you have someone who sends LU text messages during the day who also has an Apple Watch. Workout and health aspects are nice.
As far as notifications, they need to be managed but that is easily done. I added CNN and a lock TV station and have found the number of breaking news reports are reasonable.
Dark Sky is nice in that it tells you when it is about to rain.
On the downside it isn't as good as an old watch for telling time. You can't just glance down. You have to move your wrist or touch the screen. Also, I wish there were more watch faces but I expect those to come in the future.
Apps are slow. For aviation, ForeFlight is unimpressive but Aerovie Reports is much better. Still, speed or lack thereof is a problem. Native apps are coming in the fall so this area should improve greatly. WatchOS 2 looks like a big improvement.
The sport band is very comfortable.
Directions are a useful feature. While driving from DFW I had my iPhone in a cupholder so I could get it quickly to see my route. I found my watch was displaying distance to the next turn. The taptic feedback let me know whether it was a left or right turn. Once I go used to it I found it very useful.
In summary, not a must have but nice.
Here are some more general observations. Women seem happier with it than men. Techies get disappointed. It isn't like the day you got your iPad where you play with it all evening. It's a watch. Non-techies understand that and appreciate the messaging and other aspects without demanding it entertain them constantly. Thus my girlfriend loved hers from day one. I was more on the fence and have slowly come around.