Before taking ZMA, I hadn't slept through the night in about ten years or so. I would wake up 8 or more times a night if I was actually able to fall asleep.
During the past two months taking ZMA, I have never slept better! Like many, I have more vivid and memorable dreams which is due to being in REM for longer periods which means deeper sleep.
Deeper sleep = Better rest = Better recovery = You grow bigger!
Also, as you enter your 30's, your test levels will naturally decrease so anything this cheap that boosts it is defnitely worth taking.
One word of caution though. You absolutely CANNOT take ZMA with either foods or other supplements containing calcium. They compete for the same receptor and make the ZMA not work. I was told to take the other supplement about 1 hour before ZMA, which didn't work, so I tried 2 hours which still didn't work and then I figured out that my last meal had not had time to digest, so the two supplements were mixing. Started taking the other supplement before I work out at 5:00pm and I'm back dreaming all night!
I just bought a 3 months supply since Biotest was out so long. I will not let it get below 2 months if that tells you anything.