Several of my clients have had success with it. I do recommend that you have your doctor prescribe/suggest a dosage, even though you don't need a prescription. Don't take the advice of the health food store clerk. The psychiatrist I work with actually writes a presription for people. Some people need a lot more than others to work.
I use Benedryl if I am really having issues sleeping after a few nights, but it does give me a hangover. And I take children's liquid form, as one regular capsule might kill me, it makes me so groggy.