I use DSL, this is the only gear I have been using for the past year and I like it, Great gains, strength etc. I just Finished a Tren/T400 cycle and when all was said and done My bench went up 140ilbs, my dumbell press went up from 85ilbs to 125ilbs etc. IMO this is legit good gear.
Also just so you know Never had a shot hurt with this gear