Been using this for more than a year already. I'll write its effect on me, since medications/supplements work differently from person to person, I suggest you take this review with a grain of salt. I have really bad insomnia, I find sleeping pills too strong, and so I decided to try this one. The first few times I took this, I didn't feel any effect pa. But maybe around a week or less, I noticed that I get sleepy after 30 minutes after drinking this tablet. Sometimes I'd take 2 tablets because 1 tab isn't strong enough. Note that it only makes me sleepy, but not knock me out like sleeping pills does. This is good if you want to regulate your sleep or correct your body clock. I'd get a complete 6-8 hours of sleep whenever i drink this. Light sleeper and this really made my sleep continuous. The only side effect I noticed is that sometimes I'd still be sleepy/moody when I wake up. This prolly varies from person to person. Lasted me 1 ½ years na, may tira pa. Buy this if you're struggling to fall/stay asleep and if you find sleeping pills too strong. It really works.