Well, I have the S3 Frontier.....pre-ordered as soon as they became available on the Samsung site, and bagged the Level Active headphones (which I don't need) too. As one of the early round of pre-orders, they actually sent mine out on Friday 11th, and it arrived Monday 14th, although I was working away until Wednesday last week.
First impressions, having come from a gen 1 Moto 360, it is larger but really not cumbersome. The software is really nice, and the user interface very very slick - I love the rotating dial, not just the hardware feel of it, but the functionality. The watch comes with a fair few bits and bobs in situ, but I have added apps like Uber and Goal+, and they seem to work very nicely. Screen is really nice, very colourful and sharp; even viewing a photo on the screen is actually pretty good! Speaker sound quality is decent - not really one for those banging tunes, but will actually play a mp3 or something OK.
Battery life is excellent. So far, I have not tried longer than 3 days, but not having to charge more or less every day is good. The charging dock is similar to the 360's, i.e. wireless, but is also magnetic so the watch 'sticks' nicely in to place.