ICER is mentioned as the operator of The Retreat at Greenbriar. Reviews indicate that the management team, specifically individuals like Ms. Taffy, Ms. Binta, and Ms. Susu, have been instrumental in improving the property and providing excellent customer service. However, there are past complaints about unresponsiveness to maintenance requests (mold, leaks) and a fire incident where communication was poor. The company's overall reputation appears to have improved recently due to diligent staff.