I've been runningfor a little over two weeks now, and have not experienced any negative side effects. I'm currently on day 16 at four caps per day (soon to be six), and have noticed a substantial increase in my overall mental/physical well-being. Libido, muscle hardening/strength, and mood have all sky-rocketed. Not to mention a pleasantly surprising leaning effect -- seriously starting to cut up!
I do not foresee any future side effects, but I will be posting my final review at the end of cycle + PCT.