I stayed there for 2 nights (Sat/Sun) earlier in the week. Had a Diamond upgrade to an Executive Suite that looked right out to the WTC.
Diamond breakfast on the Sunday was the buffet. On Monday morning it was the regular Honors menu (buffer is weekends only).
Overall I found the hotel was nice but my experience was disappointing. I enjoyed my following 3 nights at the Hilton Times Square better.
When I arrived in the room all the cushions on the couch were sitting on top of each other as it looked like cleaners had tried to clean stains off a few. That was an easy fix (but simply shouldn't hapen in the first place) but over the next few hours found the bulb in the light above the bath was blown, there was lots of dust around the extractor vent in the bathroom, and the back of the TV remote was covered in sticky stuff from somebody else. There was also a large indent in the wall where the door safety lock hits it. All of these are minor things, but IMHO simply not acceptable for a Conrad.