I’ve used this pen for both my face and scalp (for stimulation to promote hair growth) and have had positive results. I have used once a month for four months now. I always use on Friday since my face will be red for a couple of days. By the time I return to work on Monday the redness has diminished and is unnoticeable. It only takes about 20-30 minutes. So it’s quick. Over time I know the strokes on the pen need to overlap to prevent a striped appearance and my technique has improved. As far as results, I compare photos of myself from a few months before I started. I’m in my 60s so my skin has lost elasticity and had sagging appearance. The Dr.Pen reaches to deeper layers of the skin and the effect is my skin looks and feels more ‘plumped.’ Now my skin looks like it did several years ago. As far as hair, I’ve only used the pen twice. My hair had a lot of shedding after I had Covid and was concerned that I could see my scalp no matter how I styled my hair. I have seen fuller hair, after only 2 uses. The pen can cause irritating pain so I’m use a numbing cream before use which means I have only the sense of pressure when using the pen. Be aware that when the numbing cream wears I do feel that irritation especially if I’m trying to fall asleep. I’m very happy withe the results. I don’t get people rushing up to say “Your skin looks amazing” but I can see and feel the improvement. I plan to continue my once a month Friday sessions. I want to maintain what I’ve achieved with the pen.