44 west 77th

I noticed this building was having an open house today. I didn't go as out of my price range and also I have always thought the lobby looked dark & cramped from the street, but I wanted to know if any of the SE regulars know much/anything about this building. Specifically what gives with the top two floors? I have noticed them when walking by at night and they're occasionally lit up like an enormous single window (down the middle of the building). If this is indeed a duplex apartment up there then that must be one of the truly incredible living spaces in a city filled with incredible living spaces. Anyone?