I have recently got this as a gift to my family member who is a tech geek on his birthday thinking that he would like that, but later realised that we have wasted money on this.
Coming to the specifications it workd on android 4.3 and above phones and runs on an lithium ion battery which is said to give 5 days backup which is actuallu not and is as worse as the other samsungs phones .
Seeing that there are no pros and all cons they are like cheap quality strap and poor battery backup which is really annoying and sometimes the screen lags and doesnt even show the time properly and I would say that this is gift that is gonna spoil any occasion due to its poor quality and overly priced less featured watch.