I have been using mysostat for 6 mos and I feel it worked initially and then tapered off. During the first two months I was using maintenance calories for the summer, but my calves increased noticeably. When I went back to bulking (with "help") I didn't notice gains that were out of the ordinary, however my bodyfat did stay noticeably lower on this bulk cycle. I just stopped using the week before Thanksgiving and did not reorder. I wanted to save my money for Christmas, and supps that produce dramatic gains. Not a bad product, although the results are not as dramatic over time as the ad campaign seemed to imply.