Grand Hyatt at Grand Central, NYC
We chose the Grand Hyatt at Grand Central for its location. It is pretty much in the middle of Manhattan and handy for Grand Central station - you don't even leave the building. Although it is neat and modern up to and including the lobby, it is showing signs of age inside. Furnishings are rather dark and a bit old-fashioned and the lighting is muted. We asked for a roll-away bed for or seven year old; it was so large that there was barely space left to move about the room. Fortunately this did not bother us too much as we mainly used the room to wash and sleep. Although we were not high up, there was no external noise. Neighbors could be heard rarely. Staff attitude was generally good and occasionally exceptional.
A few things niggled: I was not notified of mail deliveries; I phoned to ask a written message to be delivered to my wife and it did not happen; internet access is around 16USD per day and is not free in the lobby; the room service menu is average (macaroni cheese, that famous comfort food, was not good) and there was a 20 minute queue for breakfast. Reservations were advised for the latter. In that time I bought a good breakfast in Grand Central and brought it back to our room.
Would I go there again? For the location, yes. I can take or leave the rest.