iv used it, good product. I find preWO shot with a green tea or coffee really gets the blood flowing. b12 and vitd are main supps for me, along with normal multi and 2-3g taurine and creatin ed. only got one bottle once, not long ago but iv been using RUI for other supps and RCs/peps for many years now and am happy with them. prob pick some up and some AI on monday, crazy sale I rec you wait for.