I find ZMA a decent sleep aid but nothing more than that ive found. I have problems sleeping so i do use it quite regularly and too me it feels safer than using melatonin. Melatonin in the long run can atrophy the glands being a hormone.
I slept like a baby My recovery time's are alot shorter too but i'm putting that down to getting good nights sleep. I actually started taking it in the hope it would help with my ulcers (i get LOADS of mouth ulcers) and it has a little bit. All in all i'm a happy bunny