I had the probably worst seats in the box, on the outside and back in the front box. At first I thought I wouldn't be able to see a thing but turned out the seats had been arranged wrong (the 2 in the front had stood behind each other, not side by side) and after that was fixed things looked up. Girl next to me on the inside seat was also really nice and let me lean over when i needed to.
It did have to lean left and right a lot to see different sections of the stage, and I missed some parts stage right (was in the left box), esp when Cynthia was sitting on the floor/a chair on that side.
The couple in front left at intermission (I'll go ahead and assume for different seats), so in the 2nd act I had a pretty unobstructed view.
The house was close to sold out so I didn't try to find another seat (or ask for one), and it wasn't bad overall. The advantage vs. rear mezz or rear orch was how close you are, you can really see facial expressions, which I always appreciate.