It is famous for a reason. People come to this one-week event from all over the country. It's not your ordinary flower show - it's a spectacle. One convention floor of displays, another floor of garden-related stuff.
We took the Amtrac from the new Moynihan Station, inside the old NYC Central Post Office building. It has Amtrac and Acela.Very pleasant, clean, lots of helpful people, and without hoboes. The New Jersey train station adjacent has not improved much...

The new Penn Station has a large, and good, food court too:
A few photos below the fold -