just as mentioned above already:
I used to be a badddd sleeper. It would NORMALLY take me about 2-3 hours just to fall asleep, and if I would hear some kind of a noise, I would be up immediately and it would take me like another hour to fall asleep.
This would be almost every night.
With ZMA I fall asleep within minutes, sleep through the whole night, have dreams almost every night, and wake up refreshed.
Did we mention they're fucking cheap?