I no longer work with vanilla ACAD, never worked with ADT, or Revit. ( I am learning C3D.) That said, sheet set is in basic acad and LDT, C3D so I assume you have it. Palettes make good library tools, and sheet sets manage lots of types of data assembly, such as page, view, section, callout etc within a dwg, which may make xrefs necessary for production. Still useful in design for me personally, but in seeing their potential in production, I am making every effort to learn and create the first goby for our standards.