From an earlier post...
http://forums.jpfitness.com/noncgi/u.../t/001244.html
I hope they aren't all the same or they all would pose the same problem. As I recall, that warning was from Australia but I have queried about the Zn concern before because my multi also has Zn in it. I think it is a legit concern but the response that I got from someone (who?) was that taking one in the morning and one in the evening did not put enough in me at one to be concerned. I really don't know if all formulations are the same but I take mine as separate ingredients just because it's cheaper.
Yes, I do often sleep better (but I sleep well anyway) and it does often seem to increase testosterone production based on Mr. Happy's response. I remember johnka saying he kind of cycled in taking this and I've thought that it seemed to work better when I laid off for a while and went back to it later. I'd like to know more about that aspect.