I used MAG-10 and was extremely pleased. Most who slam it have not used it. Biotest is unpopular due to excess hype, but they make several outstanding products. I used max dose; 2 x day; 2 bottles in 2 weeks. Excellent gains in strength and size. In 2 weeks, I gained 15 lbs; retained exactly half of that after a cutting cycle. Strength shot through the roof. In my case transdermals are only marginally better.
I have 2 friends who also used this; (one went through 4 bottles) claimed it was a
waste of money. He maintains a consistent 7% bf—so he may not have been taking in enough carbs. Yet one of the guys who frequents the local MaxMuscle is an ex-steroid user, very large, impressive guy, about 240 lbs @ 10% bf. Claims Mag-10 is the only thing that even remotely compares to what he felt on real gear. None of us experienced any adverse reactions. It seems odd that a product can be this inconsistent in its effects. Probably much of this has to do with diet.
And Dio, I can point out many, many satisfied Mag-10 users at bb.com alone.