The Flick: Clyde is right. Seats are small and the theatre can be warm. Luckily, the night I went, someone in front of me complained so the house manager cranked up the A/C. Much more comfortable, but still cramped.
That said, it's an extraordinary work and Matthew Maher is fantastic!
Significant Other: Nice comfy seats, plenty of leg room, cold enough to hang meat. The play? Meh. Not bad, just nothing special.
You: Williamstown, Glimmerglass and (Off) Broadway...safe travels!