From Longman Dictionary of Contemporary Englishmuch-vauntedˌmuch-ˈvaunted adjective [only before noun] a much-vaunted plan, achievement etc is one that people say is very good or important, especially when this may not be true the president’s much-vaunted health-care plan
Examples from the Corpus
much-vaunted• The government's much-vaunted desire to consult operated only within those limits.• Christopher cut through her much-vaunted intelligence and she degenerated into passivity.• Viewed from the Winter palace the much-vaunted power of the monarchy seemed distinctly overrated. 