I pinned 1ml 2-3 times a week. I stopped using it because the IM pins hurt so much I didn't care if it was helping lol. Granted, it was a 8mm needle in my deltoid but it felt like I had been punched repeatedly until my arm was pulped. I have no injection anxiety and was completely relaxed and whatnot but still all but one of them felt horrible afterwards. I quit using it. Curious if it was a me problem. Maybe I needed a longer needle. I don't have hardly any arm fat where I was pinning at so I know it was hitting muscle.