I had about 5 laser sessions. The first session, the tech had the machine set at 'stun'. Each session, she ramped it up until, by session 4, it was just short of 'kill'. That session did leave some scarring that I can still feel a year later.
I had one more session after that, with a different tech. When I told her the results of the previous session, she changed the settings: less watts, longer pulse. It didn't hurt as much or cause any scarring. On the other hand, I had started HRT by that time, and my skin is now prone to melasma: estrogen-related light sensitivity. I now have a freckle on my cheek the shape and size of the laser probe!
So no more laser for me. I didn't have that much dark hair anyway, and my electrologist has now cleared most of that.