I just finished a vial of 500mg/ml test e and I wouldn't do it again if it was FREE. I even diluted it and it still gave me the WORST pip I've ever had. This shit went from the top of my right cheek ALL the way around to the front of my right thigh and even down to my knee. SHIT- I wasn't aware this shit could travel like that! I had one pin left and when I shot it in the sink, it looked like some sort of GEL! FUCK THAT SHIT. Never again! And this shit lasted 2 fuckin weeks. (foot note- I have had some in the past that I diluted and it wasn't terrible- but it's just not worth it to save a few bucks- just stick w/250-300mg/ml and be able to sit down w/o wincing-lol) This was REALLY serious pain. My advice is if ur stuck w/ some, draw half of it out and add 5 ml of grapeseed oil and shake the living shit out of it, and I would warm it before injecting. shits just too thick. just my exp.