I've used QV, Ttokkyo, Brovel, which were mex... human-grade like sust, testolent, genepharm winny tabs, iranian enanthate. And I've used homebrew, which I certainly consider UG. Discounting my homebrew, which is pretty much always the best, certainly for the cost, the ONLY time human-grade was better for me was the genepharm 5mg winny tabs. I've yet to get such great results from ANY winny tabs, especially at only 30mg/day. The best test cycle I did was actually 4cc's a week of Brovel T200... so probably 700mg/week or so of test enth. That was better than 750/week of sust250 or omnadren for me... take that as you will. I always try different brands, especially human-grade brands I've not yet tried, b/c as we all know, just b/c a bottle says it contains the same amount of the same active ingredient DOESN'T mean you'll get the same results lol! Like people saying the old... german?... dbol, the blue ones, kicked incredible ass at 15-20mg/day. People today are taking 50mg/day of pink thais and not getting better results. Somethings different, so I say just try different brands till you find what works best for your body. Everyone is different, so everyone will have different favorites. In general though, human-grade is of course, cleaner and more accurately dosed.