According to The DeMatteis Organizations and the Mattone Group, co-developers of Azure, the Upper East Side's preeminent luxury building located at 333 East 91st St., the property is over 50 percent sold. "We expect sales to remain strong and steady as Azure provides unmatched amenities and large units at some of the most attainable prices seen in this area," said John Caiazzo, V.P. of Real Estate Development for The DeMatteis Organizations. "Our recent sales momentum testifies to the incredible value of Azure's unparalleled product that offers generous space, great views, custom finishes and world-class services," said Karen Mansour, executive vice president of Douglas Elliman Development Marketing, the property's exclusive sales and marketing team.