Been on this a week now and the sleep is wonderfull. It puts me to sleep within about 45 minutes and keeps me down. I wake up slightly groggy but it wears off after about an hour, nothing like melatonin which leaves me VERY groggy. I almost gave up on it though, the 1st two times I got very flushed and tingly and it acted like a stim and I felt like crap. I gave it another go and am glad I did. I found it works best for me to drink my nighttime casein shake 1 hour before this then take the Somnidren about an hour before bed. No other effects yet, looking forward to some of the other GH effects, but the most important effect is that it is helping me sleep and for that it is well worth the money.