It’s been about 5 weeks since my first treatment with this pen, which is long enough to get through the swelling phase, then that awful phase where your scars look worse, and then heal some more. This is the first time something has TRULY worked on my acne scars. I’ve had fairly severe scarring on my face for a good 10 years or more. That was after about 13 years of cystic acne. I have always struggled with my skin. These scars were such a gut punch after finally clearing my acne. Deep ruts and sunken areas on my cheeks and temples. I have avoided overhead lighting and bad reflections for years. Such an insecurity.I want you to know I spent thousands of dollars on Fraxel laser treatments (5 times), IPL treatments, topical stuff to try at home, derma rollers (for 2 years), and everything else. NOTHING helped, except maybe the rollers, but it was slight enough to keep me from feeling successful. I started reading on the pens and the science made sense so I decided to buy this one. I can’t believe it, but after one treatment I can tell a significant different. The trench-like scars on my right temple are almost gone! I’m not making this up!!I used the deepest setting (2.5) on the scars, and treated the rest of my face with a 1.0mm depth. The 2.5 is no picnic, but I’ve learned enough to know you gotta go real deep for acne scars. My face was super red and swollen for several days, then the swelling went down and my scars kinda looked the same as before or worse. But after the 2nd week they gradually have filled in more and more. It’s unreal. I’ve taken care of my face after every shower w Vit C serum, a hyaluronic acid gel, and some regular moisturizer. Even my skin in the non-scarred areas looks better. More color and fuller-looking.So happy with this purchase. I will update this after my next treatment.