i only had my silicone injections for a little while, but so far i dont have any problems, it took me about a week to heal and my ass jiggles and its soft. im a stripper and i live in chicago, our clubs are all about the ass. i was always insecure about my butt but i never had the guts to do it. finally, i did one of my home girls got injections and i went to the person that did her. he used pure medical grade silicone & her numbed me. it didnt hurt, he was cleaned he changed needles & answered all my questions. im satisfied my butt is round i have hips now & it looks natural. i would just say do your research.