This watch works well. I even want to say very well, since being an automatic watch, it is normal when you do most door it will eventually stop ... But with time she can get used to our movement and hold more than a day to operate even if you do not wear it. Once I shook very hard and she keep running all night. I think if you wear the sleeping it does not stop, because this watch uses the movement of the wrist particular. I chose it for the apparent motion in the lower center as well as the phases of the day. It's fun and original. But also the small trotter red in the center that runs continuously is nice. Nice watch for that price. However, for those who want to always have the time accurately and have all the time need a watch (which I concede is the main work of a WATCH) it is better to turn to a cell model . But for those who like to wear watches and watch them as much for the style for the time (but, provided always wear ... It's a bit like a modern phone, its charge lasts no more one day, unless the load constantly ... like this watch, it must be still loaded, and the energy of this watch is the movement of the body and wrist ....) I am satisfied with this model, however even though I would have liked to have autonomy is more than one night if you do not wear it. Because I do not sleep wearing my watch ...