Produced by the Roundabout Theater Company, Sondheim and John Weidman's controversial musical about presidential assassins opened Thursday at Manhattan's Studio 54.
Leading the praise for the show was New York Times theater critic Ben Brantley, although Times Arts and Leisure columnist Frank Rich is also said to be writing a rave, The Post noted.
The Post's Clive Barnes didn't love the show, but most of the other notices published Friday were extremely positive.
One point up for discussion is whether the show is a "new" musical or a "revival," since it had a brief run 13 years ago at Playwrights Horizons.
That answer will be determined on May 6 by the 24 theater insiders who sit on the Tony Awards administration committee.