Allergan (Natrelle), Mentor, and Sientra are the big three in terms of breast implant companies in the United States. All implants they produce are FDA approved, and thus have been rigorously tested and found to be safe. Choosing between these implant companies is kind of like choosing between Mercedes, Lexus, and BMW when buying a car. All three make great products with slight differences between each that makes one more preferable over the others in certain circumstances. They each make comparable implants in regard to shape, volume, projection, shell, and silicone gel cohesiveness. Each plastic surgeon has his/her own preferences based on several variables, largely including familiarity with their products. Choosing your plastic surgeon based on elite credentials, excellent before-and-after photos, and your personal comfort with him/her is a far better approach than picking your surgeon based on what implant company he/she uses. In fact, many plastic surgeons use multiple different implant companies based on which implant they desire for a certain situation. I would recommend consulting with a plastic surgeon who meets the above qualifications, express your goals/preferences, and allow him/her to pick the best implant to meet those goals/preferences. Best of luck! Ziyad Hammoudeh, MD