Last time I saw the show I sat in the back row of the Mez with those $90.00 tickets. I am a huge fan of the show but I felt rather distant back there, it does seem very far back, although you can take in everything, from back there you don;t really see the costume details and spend too much time looking at an empty stage (even the interesting texture pattern on the stage gets somewhat lost back there and it just looks brown)
http://www.flickr.com/photos/27199361@N08/ Phantom at the Royal Empire Theatre