I got a chance to see a few of them today, our Apple Business Team rep was coming in for something else and brought a few demo units.
It feels like a nice device, the nicest looking smartwatch I've seen so far (not saying much), and still not something that remotely interests me. He had a sport, one with the stainless links, and one with the milanese (sp?) band. Ironically I thought the sport was the nicest looking, it was the dark gray one with a black band. The band felt much nicer than most sport-type bands, if they keep improving the exercise monitoring stuff and decrease the size a bit it may be useful in a few revisions.
The more 'fashionable' bands were a complete miss for me, I can't see replacing my normal watches with a trumped up Casio.
All that being said, they supposedly hit 1m sales on the first day, and I wouldn't be shocked if they're past 2m by the weekend. Good time to own AAPL.