Yah, I have ran atd solo. I would say that this stack felt much different than solo atd. Solo atd dries me out like crazy. With all of the dhea in there, I didnt feel dried out at all. I did stop the atd cold turkey, but I have never had any problems doing so with atd in the past. I have loads on hand, as well as lots of other goodies should a situation arise. Still no estro sides to speak of, though I am not particularly prone to them. I have noticed that I am more pumped at the gym since the sessation of said stack. It could be a sign of slightly increased estro. By pumped I mean that I seem to be holding a little bit more water, nothing to worry about though. I should also add that this stack yielded better results that atd solo did. I would recommend some more people trying this stack out... not much for mass of strength, but it is fairly decent for recomp and not really that suppressive at all.