I keep a bottle of this on hand for my occasional sleepless night and for when my teenagers have trouble sleeping. If I use it every night, I notice it won't work as well after a couple weeks, so, I try to only use it for those nights I really just can't get to sleep. I fall asleep generally within a half an hour, and sleep well. I wake refreshed and do not have any grogginess. Great to keep in the medicine cabinet as a natural sleep aid. Much safer than other alternatives.