A musical that riffs on Shakespeare while plundering the back catalogue of one of the most successful and prolific songwriters in pop history (Max Martin, who is only not a household name because he prefers the spotlight to be on the interpreters of his work: Backstreet Boys, Britney, Celine, Katy Perry, even Pink and Bon Jovi….you’ll have heard of them) was always destined to be either a car crash or a triumph.