In short, the product itself is a beautiful object, the screen is very bright and the colors are bright, the rubber strap looks strong is the tie badged Samsung is brushed aluminum (scratches easily).
Level functionality was well pedometer that seems reliable, convenient can easily pause to avoid eg to recognize 100-200 not just doing the dishes! It also indicates the km covered and Cal spent.
The watch vibrates at each incoming notification (email, SMS, call) you can also set the applications that will send or not notif the watch youtube for example, banking apps etc ... Once notif read on the bracelet, shortcut on the watch directly opens the corresponding app (email, sms ....) on the phone for example respond directly to the author of received sms and that's handy!
Sleep monitoring is not bad, it saves time to sleep and% without movement, I preferred the Sony app that displayed the deep sleep / light.
Level pulse sensor is fun but nothing more, if you move a little the watch can not take the measure .... so do not buy this watch to replace a heart belt type or pulsar because garmin you would be greatly disappointed !!!
The watch can also control the phone mp3 player and that's frankly top power play a song or go back without leaving his phone from his pocket, same for volume control! And it also works with soundcloud, so can be with other apps from Spotify or Deezer style!
Level autonomy for the moment I want about 3 days having fun from time to time to tinker the above options, therefore reach 4 days seems feasible, which is not bad!
I am therefore satisfied, even if the contract is not fulfilled 100% especially at the pulse sensor, I did not yet use the watch when bike out but I think (hope) it can display information from the distance style, speed .... times an app like Strava or Runtastic, to see ...