I have done several cycles over the last 2 years while on aas. I get very good pumps, 1" on arms with IGF-LR3 with out IGF only 3/8" to 1/2". I recover faster and injuries heal much faster. To be honest, I really cant see much if any muscle gains. I only take it when working upper body at 60 to 80 mcg's. I work whole upper body in one day every 5 days. I may not be taking enough. My first cycle [no aas]I did 40 mcg's twice daily every day for one month. It is way cheaper now then when I first bought it so I will keep using,but if the prices were higher I wouldn't bother.