I take 3mg most nights and find it's an very effective asleep aid. I've tried breaking up the tablets to take around 1 to 0.5g but I don't feel like it does anything. Of course, this is purely anecdotal and it may well be placebo. But it works and as someone who often struggles with sleep I'm not gonna complain when I find something that helps, placebo or not.

At worst, it's far less harmful than drugs, and at best, it may have a bunch of other benefits from reducing cancer risk to reducing depression, to helping with acid reflux and GERD - none yet proven though.