While it didnt seem to be addictive to me I only used it for a week and then the vividness of some of the dreams bad and good caused me to stop. It never helped get me to sleep earlier. I didnt think that drastic of a change from normal was worth my mental safety.
No it's not. And there's very little side effect if you buy from reputable brands. About the only issue I have is that it's difficult to find melatonin in the appropriate dose (0.3mg); it's far more common to find 3mg or even 10mg.
Nope, I don't actually use it every day. It's just to reset the schedule and then I just fall asleep without. As far as I know you don't build up resistance or anything like that if that's what you're worried about.
The most I’ve needed is four days after London to SF. Oddly, even Hong Kong to SF wasn’t that bad.
Occasionally, we’ll have a couple of late nights hanging out and then I have to fix it again. Holiday season like now will probably need work. Then it’s just two days.