MTA subway is right down below the building... Great during raining and snow... Little caveat-> its open till 730pm only and u need to walk to grand central after that...
Avoid the vending machines here at PwC as .90 for a bag of chips is a rip off! Go to Jacks on 40th St. Between Madison and 5th. For a $1 you get 2 or 3 small bags of chips or $1 for 1 big bag!