First of all, I think it's a very personal decision and why you care what a bunch of folks on the DIS boards thinks is beyond me. You need to discuss it with your family and trusted friends, with other people who've had them for the same reason you are considering it (whatever that is) and most of all with your doctor!
I know 2 people who've had them and one who's going to on Tuesday. One of the people who's already had it and the girl Tuesday were/are completely flat chested. They've been very self conscious of that and felt unattractive about it all their lives. They both have done the padded bra route - but there's only so much padding you can put on nothing! The kicker on the girl that already had it done was trying to find a bathing suit. These are both very, very thin women and she wanted a two piece but looked awful in all of them. I used to try and talk the girl that's going to have it done Tuesday out of it - but when she told me yesterday she's having it I told her I fully supported her - it's something she's talked about for the 4 years I've known her, it's obviously important to her and she's saved money for this as long as I've known her. She's not getting huge boobs - and neither did the other girl - she going from literally nothing to a B cup.
The other girl I know that had it done is vain, self centered and shallow. She had perfecly proportioned breasts and she looks ridiculous now.
And a BTW - the girl that's having it done Tuesday did a ton of research and found out she can have it done much more cheaply but with a reputable Dr. by going one state over to Alabama. They apparently don't have as high liability rates as we do in GA and she's getting hers done for 2/3 the cost of the girl that had it done in GA. So look into that if you decide to do it.
As someone who is more then well endowed in that department, I know that I can't understand what it feels like to not have any. That's why I finally realized I needed to shut up with my friend and let her make her own decision.