I regret this, as I now have an obvious scar on my areola. Remember, finding the right PS is the most important factor for a good outcome. It also decreases ripples which are common in thin women and with thin skin. I have some you can feel, but rarely noticeable to the eye. I can feel them, but rarely see them unless I' m in an odd position.
Overs can look very natural when done right, here's an excellent example of overs .
My PS lowered my crease, most do. This was especially important for me as my areola was very low due to sag. Lowering the crease in effect gave me a lift. Mine are also uneven, a really good PS will be able to even them back out. If this is important and yours are obviously uneven to the eye, you'll probably have to shop around for a good PS , as most do not do this.