I've had a few friends here at home (one one Yelp-er) ask me about seating for this show. Please keep in mind, this is the perspective of a Phantom lover who is also a theatre production-ist for smaller theatres...
Seating at Phantom - I sat in the center Mezzanine and actually liked it. I simply couldn't afford the lower level this time around, but as a bonus there is a second bar upstairs which was empty in comparison to the downstairs bar, plus I was able to see a lot more of the theatrics of Phantom above the stage and in the chandelier. They also built out the balcony seats into part of the set. That said, I think if you want to see the actors better, on the lower level I'd stay in an aisle, but in the AA - GG rows. Then you won't be too far forward to miss the chandelier or too far back to be under the mezzanine. Oh - and I should tell you that there is an understudy for Christine 2 nights a week, I believe it was Tuesday and Wednesday. :) Have fun!!!!