I know what you mean. The sweetspot is small and sometimes elusive. Also, it seems if I take it before bed and almost immediately try to sleep, it works perfectly. But if I take it planning to go to bed but get preoccupied with something else and forget I took it, at some point I'll look up from whatever I'm doing and realize suddenly that it's kicked in. If this happens, I usually won't sleep until it has started to wear off. Weird drug. It can either fix insomnia problems with perfection, or cause you to not want to sleep at all depending on dose and time before lying down.