Hi, Thanks for the question. In my personal opinion, the key to Bellafill is to understand that it is NOT a filler, it is a collagen simulator, so when we talk about the 5 years, we are basically talking about up to 5 years of collagen, which translates mostly into skin firmness and elasticity and ofcourse in some extent into fuller looking, but compare to other fillers at least in my opinion, Bellafill has less filling abilities and more of firming and elasticity producing abilities. One last thing is if it comes to acne scars, situation is totally different, as in acne scar as generally little amount of filling is needed and also firming is really helpful... Bellafill turns out to be a very great product... as long as we understands that result is never 100%! I hope this helps :)