I have done one before, I got the 4000 peel. It worked really well!! I haven't heard anything bad about them myself. But it took all my old acne marks away that I couldn't get rid of. I have to say I loved the peel, because no other peels I tried were deep enough to get those marks gone. It's very expensive though, so if you're willing to try it out for that price, then do it. It doesn't prevent acne or anything though, so if you're prone to getting breakouts still, then don't expect it to cure them. It just worked wonders for my red marks! I'd do it again and again if I could afford it!!