I had some significant assymetry that I wanted to deemphasize. I also just wanted slightly larger breasts.
I had 300 ccs put in, under the muscle through my armpit. No visible scars. I can't even find the incision when I search my armpits.
By now, I think they have cost me about $0.70 a day. So worth it. They literally make me happy everyday when I get changed and see how pretty they still look. This is after two years of breastfeeding, too.
I'm realizing that I will need to get them redone sometime, so I've been researching that.