So the watch is supposed to prompt your PIN once it breaks skin contact right? Well, I've been playing around with it and apparently theres a small gap between the time you take it off and when it locks. I've been able to successfully take off my watch and then just put my fingers underneath right after and it doesn't lock at all. As a matter of fact, it actually bugged it out to the point where it wouldn't lock again until I restarted the device. Try it out for yourself. I think this is kind of a big security flaw as it leaves the watch open to theft or unwanted access to your information, no?