Melatonin's nice, but I can't sleep any more than 8 hours on it (I need around 9.5), and if you sleep less than 8 hours it makes the individual groggy.
I also sleep shorter after melatonine, but I feel more awaken then after more sleep without melatonine. Of course that's only after week or two of taking melatonine. First few days when your body clock adjusts might be rough.
