The stuff HURTS, simple as that. My first injection was 1 1/4cc's in my glute. I got flu like symptoms, and my ass hurt like never before for several days. Then, like a dumbass my next injection I did 1/2 cc in each delt. Well, let me tell you, the next morning I could not raise my arms, and again, I was sick as shit. Finally, about 3 days later I could lift my arms enough to do normal, everday shit. I've done my quads too, and the same damn thing.
But, the good news is that the pain lessened as time went on and the flu symptoms disappeared as well. I put on about 15lbs in the first month with it. I was doing around 400-600mgs/wk.