I've played with it over the last 4 nights and found that I like 10 pumps, which has successfully kept me asleep from 10ish until my first wake up at around 4am- which is a HUGE win for me. When I dropped back to 5 pumps, I slept deep, but still woke up at 2am- luckily was able to get back to sleep within about 15-20min.how much did you take?