Hello Mr Enis!
One of my three watches that I bought recently weeks isn't working as it should. 
 
Even though I'm wearing it all day the time stop to work accordingly and after 2 hours always get 10-15 min away the correct time. 
 
I even try to wind it up several times a day to see if this is the problem but still it doesn't work accordingly and after some minutes it starts to go slow again and behind the original time by 5-10 min.
 
This is the reason why im sending in this watch. Otherwise I have nothing to complain.
Best regards
Paulo Mukooza