i took their suspension (anabolic ts or st or whatever) and i hated it, very bad pain couldn't walk for 3-5 days, stopped it after a week. my roomate and 3 other of my buddies are using their winny, 2 of them are having severe pain from the injections, and 2 of them are having no problem. i dunno if its variance in crystal size, or the persons threshold, too many variables to consider, nonetheless bottom line is that some people have problems with injections...good luck