Hollywood Reporter is a rave. Here' the first several paragraphs:
The Shakespearean references come thick and fast, along with the winking nods to a whole plethora of modern musicals, in Something Rotten! But the laughs in this rambunctious comedy by Broadway newcomers Karey and Wayne Kirkpatrick, written with British humorist John O'Farrell and buoyed by a top-drawer cast, don't require comprehensive recall of classical theater or a particular receptiveness for arcane Broadway in-jokes. This is a big, brash meta-musical studiously fashioned in the mold of Monty Python's Spamalot, The Producers and The Book of Mormon, loaded with crowd-pleasing showstoppers, deliciously puerile gags and an infectious love of the form it so playfully skewers.
While it's been done countless times before, watching a musical that pokes fun at the very idea of a musical remains irresistible sport, especially when the digs are as celebratory as these. There's nothing mean-spirited even in the taunts aimed at frequent spoof targets like Cats or Les Miserables. The first-act high point is a riotous self-parodying number simply titled "A Musical," which represents with mounting excitement everything that's ludicrous and wonderful about the form at its most ebullient — people bursting into spontaneous song; perky chorus members thronging the stage; an explosion of tappers, fan-dancing showgirls and a kickline; even the magnificently cheesy tradition of the encore reprise.
There's no director-choreographer better equipped to stage such an irreverent homage than Casey Nicholaw, whose adoration for the unbridled excesses of old-school razzle-dazzle has been evident in his work on shows from Spamalot and Mormon through The Drowsy Chaperone and Aladdin. If the songs themselves are standard-issue show-tunes, they are elevated by dynamic staging and performances. Nicholaw can spin froth into a full-bodied confection, even if this one cries out for something more substantial at the finish. But while Something Rotten! might have benefited from a more robust second act and a punchier closing number, the show is clever enough in its impish desecration of highfalutin history to make it a very agreeable lark.