So anyone with a watch (e.g. G-shock) that had the auto light come on when you turn your wrist towards you knows just how maddening the system can be. Sometimes it works, sometimes it doesn't, and sometimes even the 1 second or 500 millisecond delay can drive you crazy. The worst part is you start doing a very precise exaggerated movement to get your watch to work right, and I hate that personally. No reviews have touched on this, and it is impossible to try out how accurate/precise the apple watch is in the store because all the fitting units are running a demo and not live. The live watches are mounted onto an ipad-like slab. Well, this review basically cuts to it and shows you that the current version of the watch is going to be inconsistent at best: https://youtu.be/SaC00homOiA?t=2m I guess I will have to wait and see how good/bad it is in person.