I am 100% happy I bought the Watch. I got the 38mm Sport, and for me, it was well worth it.
I'm very pleased with:
- fitness and health tracking
- reminders to be active
- totally silent notifications
- notifications of emails/calls/texts when my phone is in another room
- weather on my wrist (I use this way more than I ever anticipated)
- overall comfort and appearance
- battery life, as mine has lasted all day every day since purchase
- auto-population of responses for questions in texts
- haptic feedback for directions when using Maps
I'm disappointed by:
- limited availability of bands for the Sport models (though I think this will improve with time)
- shaky reliability of "Hey, Siri", especially regards sending/replying to texts
- lack of ability to customize things like how long the face stays active
- the insanely tiny number (8?) of possible user-defined responses for texts, which badly needs to be far larger (25+ would be nice)
Overall, I think it's an incredible first-gen product, and I am hoping it's a massive success so Apple will continue to develop further generations.
I might not need a smartwatch, but now that I have had one, I want to never be without one again.