Scarywarhol really hit the nail on the head. As with any splashy musical, there are big dance numbers that are better enjoyed from farther away, but the rear mezz at the Broadway is waaaaaaaaaay far away.
I agree with the others: it's very far back. I sat in Row P (the third to last row) and, though I could see everything, I felt like I was three blocks away. I'm not complaining because I only paid $30 and I was still able to enjoy the show, but, yeah, it's far back. Don't sit there if you care about facial expressions (or faces in general).