This is perfect!!!! I paid $700+ a few years ago to have someone do this for me. You know a “spa”. I saw results and wanted to see more but not at that price. I can dial in the depth I want my needles to go in. The instructions are clear as to the maximum depth per area. Coconut oil for afterwards no matter what. Lidocaine for before so you can handle the pain. My acne scars are less today than they were two weeks ago right before I did the first treatment. I love this. One cartridge per use. And if I only do it once a month I’m set for the whole year cuz they gave me 12.