Thanks for writing,I believe that micro-needling works very well and is a good collagen stimulant. The results will take weeks to months to show. Typically we use a series of three treatment one month apart. There are many devices, some are medical and some are not. We have the ability to change the depth of needle penetration, which I find very important as different parts of the face have different thickness and quality of skin. The "PRP", I have a little trouble with, as when skin is needled the tissues will ooze and guess what come out plasma / serum. So maybe we produce, at the wound / needling site, our own PRP and you as a patient don't have to pay the extra dollars. I am also not certain it makes any difference. Good LuckStephen M. Davis, MD, FACSCertified: American Board of Plastic SurgeryMember: American Society for Aesthetic Plastic SurgeryMember: American Society of Plastic SurgeonsMember: Realself Hall of fame