Great topic. I am on the fence. I want them but am afraid of the long term results, maintenance, and all that stuff.
I've found that results depend on the surgical technique and the type of implants. Silicone is better, IMO and under the muscle looks more natural, especially if you plan on competing at at lower body weight. Keep in mind that's only my opinion from the top of the bed, I've only worked with about 20 surgeons and they are the ones with the most important answers. If you've had children and/or breast fed then you may want to consider a mastopexy
along with the implants. Finding a surgeon who cares about making them look natural can be a challenge, depending on where you live. There is no maintenance although you cannot work out for 4-6 weeks afterwards and you may need a different type of mammogram. I've heard that they last an average of 10 years but I have yet to see the flood of 10 year implant updates you would expect if they really only lasted that long. The biggest complaint I've heard is that women wish they had gone bigger. There can also be loss of sensation on the underside of the breast but women don't notice it after a few months. Costs can range from a few thousand dollars to over ten thousand depending on the area of the country, added procedures (such as a mastopexy), the reputation of the surgeon and the economy. Plastic surgeons are hurting right now so if you were ever to get a discount it would be in the current economy.
As for the scare campaign about silicone implants in the 90s, some great investigative work was done by 60 Minutes to uncover that the studies and "harmed patient groups" were paid for and organized by a group that was a cover for the very lawyers who brought the class action suit(s) against implant manufacturers. This, of course, never made the same headlines that the scare campaign did and it took about a decade to get silicone implants back on the market. We've been implanting various silicone devices in patients for decades with no problems. But you take a bunch of young women with diffuse symptoms, a group of lawyers, a company with deep pockets and mix them all together - you find a class action lawsuit in there.
If you have the money and the desire to get implants then go for it! I've watched some of my friends absolutely blossom with new self confidence afterwards, especially those who have been small most of their lives.