The RHIC physics programs rely on par5cle beams of exquisite quality. For high luminosity this means maximizing the beam intensi5es and ensuring that the bunches of par5cles comprising the beams are as small and dense as possible. For experiments with polarized protons, the beam’s polariza5on must also be preserved. Within the past few years the quality of RHIC beams has been improved significantly. Precision measurements of the beam’s proper5es have allowed for applica5on of mul5ple beam-based feedback loops during accelera5on to full energies and in prepara5on for the colliding beam experiments. In this presenta5on we mo5vate the need for feedback-based beam control, the major changes implemented for improved resolu5on, describe briefly each feedback and present experimental results including those from an ul5mately challenging requirement involving accelera5on and decelera5on of par5cle beams with a full suite of orbit, tune, coupling and chroma5city feedback. Lastly we describe the benefits to the experimental programs resul5ng from these developments.