I'll dissent and say that I didn't enjoy the onstage seats at all. I guess it's a fun and interesting experience to sit next to actors and be watched by fellow audience members for some, but it did nothing for me. When I did it, I was so far to the side that I might as well have been in the dressing room, I missed about 60% of the lyrics because my seat was level with the onstage band, and I basically looked at the hips and asses of the actors all night. It wasn't until they exited after the curtain call that I realized they had faces. This was when the show was off-Broadway, though; don't know what the onstage seating is like at the O'Neill.
I saw the show from a good orchestra seat early in the Broadway run and enjoyed it much more than being onstage.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body