Saw a preview on Monday and loved it. I've seen other stage adaptations of the material, all competent, but this was the first that made a real case for "Mockingbird" as a piece of theater, and it packs a punch. The script is non-linear, beginning with Scout (played to perfection by Celia Keenan-Bolger) wrestling with the facts of Bob Ewell's death. Our knowledge of that plot point colors what we see as the evening unfolds, and the structure allows Scout, Jim and Dill to guide us through the story freely. For instance, one of the courtroom scenes proceeds a scene in which we see Atticus accepting the case. The tension of what we know will come of this decision gives the scene extra depth. Sorkin embraces the possibilities of theatrical storytelling in a thrilling way, and even if it's a story you know well, you will encounter it in a new way. I was deeply moved several times during the evening. There are many transitions, and while they are well thought-out and the narration never stops, it does distract and break up the action. There are two kinds of scene changes--shifting to Atticus' house happens mechanically (it both flies in and rises from the floor, as well as having porch pieces that float in from the wings), while the courtroom is assembled by "the people" (the actors pull everything in from offstage). It's a lovely, if unspoken, metaphor. The acting is uniformly excellent, the scenes are fleetly played although the evening is long. The first act is bloated at 90 minutes. Especially the scenes with Mrs. Dubose, which come late in an already long act, could disappear or become narration with very little loss of content--and we'd lose a couple clunky scene changes in the process. Jeff Bridges is giving a lovely performance in an enormous role. At times he hits the same emotional tone over and over (how many different ways can you be open-hearted, forgiving and tolerant in speeches about man's essential goodness?), but he will certainly find other levels, he's a brilliant actor well-cast. "Adults as children" works perfectly in this context, mostly because the structure is so freewheeling. (In contrast, the use of adult actors as children in "Bridges of Madison County"--also Bart Sher--was distracting and amateurish, because the rest of the story was told so literally). The play is presented as a period piece, but there's no doubt Sorkin believes in it's relevance, and has constructed dialogue that pushes that button without being preachy. We are left to see the parallels ourselves, and it's clear that the audience does. My one quibble is the use of choral singing during sections of Adam Guettel's score--it all sounded terribly messy, distractingly so. Actors who are not really singers trying to achieve complicated harmonies while moving set-pieces just did not work. Give it to one or two people, or pre-record it. That aside, this is a terrific night of theater with world-class writing and performances.