Btw Suki, the Westin is in Center City West. It used to be called the Ritz Carleton before Ritz Carleton moved to Broad Street.

I don't disagree with you on the location of the Westin, but betterbidding.com says that it is listed as Philadelphia City Center East.

FWIW, I've stayed at the Doubletree right on Broad Street and found it quite comfortable.