"Sientra is a Brazilian Implant company that is run by a past CEO of Allergan." - savannah536.. OOPS, that is a major prevarication -- please double check your facts. Mssr. Hani Zeini was never CEO of Allergan(AGN). His "c-vitae" shows that prior to founding Sientra, he served as EVP at Inamed Corp. under Inamed-CEO, Nick Teti. It's great to have the extra competition in mammary implant market, however; Allergan and Mentor-JNJ are the established global market leaders representing the gold std. Reputation and experience will rule in the mammary implant market sector. Please let me direct your attention to the PIP implants scandal that's dominating the global mammary implant market. I am betting that Allergan will emerge the winner, and the major beneficiary when the dust is cleared, heck; AGN is already winning in the replacement of the PIP implants in Europe.