This stuff is awesome. The bottle says you can take 40 drops two or three times a day, but I take 30 drops before bed every night and have been having super lucid dreams that go on all night, so that when I wake up, I actually feel like I went on a little 8-hour vacation. The best/worst part about it is that you sleep so well that when you wake up, you're UP. I find that increasing from 20-30 drops kept me asleep 7 hours, whereas 20 drop knocked me out for just four or five hours.
Even better, this stuff won't make you dopey. It's not like taking a swig of Nyquil and passing out. It will make you feel more relaxed and comfortable so that you can sleep, and then when you're asleep, you'll keep that REM sleep a whole lot longer.
LOVE this stuff.