It’s rare that a play comes along that is as intensely personal as The Baltimore Waltz. Seeing Paula Vogel’s 1992 play is like getting a private window into the author’s soul laid bare. Such autobiographical works can be devastatingly rewarding when done correctly, but also have a tendency to fall apart at the seams if the author lets their emotions get in the way of their dramaturgical instincts. Thankfully, while the edges of The Baltimore Waltz are slightly frayed, the play still amasses to a highly moving evening of theatre. Paula Vogel will get her long overdue Broadway debut later this month with Indecent, but west coast theatergoers are also given a great opportunity to celebrate the always innovative playwright at the Magic Theatre in San Francisco, which is producing a top-notch revival of the play in celebration of the company’s 50th anniversary.