It helps that Jason Robert Brown (Parade, The Last Five Years) has written a lush and deeply romantic score, filled with rich and melodic duets that show off its leads' terrific voices - their second act rafter-shaker 'One Second & a Million Miles' is destined to become a cabaret staple. The tunes help compensate for Marsha Norman's more problematic book, which stumbles whenever the spotlight isn't on Francesca and Robert. The story has no real villains, or even antagonists, to work up a plot worth sustaining for 2 hours and 45 minutes...Director Bartlett Sher does his best to fill the space in the Gerald Schoenfeld Theatre. Ultimately, this is a chamber musical that is both introspective and modest at its core. But when O'Hara lets her guard down and opens herself up to the possibility of romance, and when her magnificent soprano belts out Brown's swooping melodies, even a small space can seem as wide and expansive as an Iowa cornfield. B+