Ok - when I got my bottle - I made the stupid mistake of taking one during the day - which managed to knock me out for the rest of the day. I spent that day napping on and off. *laughs*
So...I said to myself, "Nope - only at night with this stuff!" and just take one capsule at night (470 mg.) and it really helps me with getting the deep 'restorative' sleep that people with CFS don't get.
I love it because I don't wake up groggy or anything and do feel 'refreshed'. I plan to keep using this for who knows how long because it works so well for me.