I had silicone, high profile, over muscle, inframammary crease incisions. My scars are visible but faint and I don't walk around without a top on so they're not an issue ;-).
I have some numbness under the bottom half of each breast and my nipples are more sensitive, but again, nothing that would have dissuaded me had I known about it ahead of time. My clothes fit better and look better and the improved proportion makes me look thinner. No one noticed my implants, they just thought I'd lost weight and looked great.