macnyc said: "The seats in the box are moveable, so I don't know how the first two would have no leg room. Maybe the first two are fixed, I don't know.
A friend and I sat in seats 3 and 4. (I was on the inside.) My seat was the worst of the five seats up there, and I could see pretty well for most of the show. If the person in seat 1 leaned forward, though, she blocked my view a bit. Plus, you can't see anything on the far left side, under the box. But not much is happening in that spot beside entrances and a bit of the baseball glove scene.
Also, there are some times when the staging has Ben Platt facing audience right, which means you're looking at the back of his head. It was during a crucial scene in Act 2, though. Another time, during a song he's facing that way and Laura Dreyfuss is facing the other way, but Ben's head blocked hers completely so I couldn't see either one. But things like that are relatively brief.
But the sound is good up there, and for $69 I would say go for it. If you're in seat 4, ask the usher for a booster seat. Box seats are available only through the box office, as far as I know. Also, only one box is in use. The other box has what looks to be either the lighting booth or the sound booth.
There is a slight step - not even a step, but perhaps a 1-2 inch step that prevents seats 1 and 2 from moving back, so your knees are right up against the box wall. Perhaps Seat 2 is slightly better with more room, but I was sitting in seat 1 and it was tight. I agree that seat 4 is probably the worst of the 5 seats there. But for $69, I had no quibbles, especially since I saw the show Off Broadway and didn't want to spend money for a full price ticket.