IMO, it doesn't matter where you sit in that space. I sat very close (first row) but at intermission walked around. It's so small it doesn't matter.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle
I'm sorry I don't know the exact numbers, but I was on different sides for each of the shows, and I could see pretty much everything as well as I wanted to. I don't think there are any bad seats. They really do take advantage of being in the round, and no one in the audience is left out of the action.