This has become one of my more popular locations to use for engagement sessions mostly.  The location makes it more doable since its close to either Rittenhouse Square or UPenn's campus, but its one of the top spots in all of Philly to get a nice skyline shot with you two.  There is a little work to it since some Frogger is involved for me, but it works out well for the last shot in an engagement session to capture either a sunset or nighttime shot of the city with you two in the limelight.