Blair Kamen says there’s no question that Daniel Libeskind has designed a gem of a building in Denver. But how does the new wing do as a showcase for the art it was built to house? Well… “It is a startling, sometimes over-the-top piece of architectural sculpture, a surprisingly sensitive shaper of urban spaces and a disappointingly spotty art museum in which basic functional problems have not been adequately solved, like how visitors, especially those who are blind, will move around without conking their heads on the architect’s insistently tilting walls.”