I happened to play with a demo unit of the S2 and these are my observations : 1.) Very lightweight. My Apple 42mm SS is quite heavy. 2.) Revolving bezel takes some time to get used to but is nice. Nice alternative to buttons and crown. 3.) Overall build quality does not feel premium and feels very 'plasticky'. Apple Watch feels premium from the word 'Go' but then we pay for it as well. 4.) I don't know whether it was the indoor lighting but the display felt very subpar : brightness and colours were lacking vibrance. Apart from direct sunlight, my Apple Watch wows me with its sharpness and colour reproduction. 5.) The Samsung Apps looked quite well done but I didn't get the chance to check out 3rd party apps. Apple Apps have a similar build. 6.) Unit hanged after I pressed on an app. My wife says it was 'just because of me' because it was fine as long as she was playing with it ! Cheers !