I have spent thousands of dollars over fifteen years trying to get rid of the cystic acne scars. If I could upload pictures to show the results in just nine days, I would! I am so thankful that I found this seller, because I could not find a doctor in my area to provide TCA Cross. The directions are simple to understand and this was so easy! My skin is already beautiful, though I will definitely be doing more applications seeking perfection. I cannot wait to finish this, so that I can purchase more treatments to deal with age spots next! Thank you, thank you, thank you!! To purchasers, if you are a visual learner, I would recommend watching some YouTube videos of doctors doing this so that you can see how it is done. Also, don't be fooled into thinking it's not working if it doesn't frost or hurt. It didn't for me and it's tempting to keep doing it when you should not. I did not see any effects for at least three days. Good luck!