Nothing to say about the fastest time advertised. The watch itself is very pretty, both elegant and sport. The time setting is made automatically when opening the box! I have not been able to test the time change summer / winter but I do not care. As for all the functions, you better have time to learn to use! With a little patience we shall get there. It's a counselor at shows, I had made a complete study of 5 Casio models of the same type, that is in my opinion the best compromise price / weight / size / features.