ive been using mts's e1 500mg/ml for around 8 weeks now. probably got enough for 20 weeks. even though its a slow compound, I felt it kick in relatively fast! I did 500mg e3d the first 5 weeks, then lowered to 400mg e3d. increased vascularity, capped delts and slow steady gains. the oil is also suuuper thick haha. very good quality and very happy with the results so far, even though its just begun.