I'm considering Vivace as a finishing treatment after other acne scar treatments (I've had decent results so far with TCA Cross and subcision). However, I'm concerned about the subset of reviews I read that report long lasting "holes," scarring and other awful side effects. However, other reviews are glowing. What factors could lead to a bad outcome - E.g. is it experience/technique of the doctor, skin type, or something else that could mean the difference between a good / bad result? Thanks!