I rushed it this past Sunday. There were around 10 people in line total when the box office opened at noon. For whatever reason, next to no-one is rushing this show, but that can't last forever. It's easily in contention for a Best New Play nomination, and there should be several nominations for the cast as well. My advice would be that as long as you go soon (this week or next), you can get away with getting there <30 minutes before box office opening and still get a great seat. I can't predict how fast word-of-mouth will spread on this gem, so getting there soon is key.
I was first in line, and my seat was orchestra B9, which is second row, far left. It's supposedly "partial view", but I missed absolutely nothing except some final bit of imagery in the very last moments. I can't say more than that without spoiling things. The majority of the action, as others have said in other threads, is on a raised platform in the center of the stage. Any seat is a good seat for this one.
BROADWAY: The Cripple of Inishmaan, This is Our Youth, If/Then, Hedwig and the Angry Inch (x3), Cabaret (x2), The Real Thing, A Gentleman's Guide to Love and Murder, Chicago, Les Miserables (x2) Disgraced, Finding Neverland, On the Twentieth Century, Wolf Hall Part I, On the Town, Fun Home; TOURING: Jekyll and Hyde, The Book of Mormon; LOCAL: The Twilight Zone, Anne Boleyn, Death and the Maiden, The Lying Kind, Chorus Line, Stupid F**king Bird