Wave/interval starts good idea for safety, but even then makes for a super crowded bike course. Spent most of the bike yelling "on your left" as you pass a couple thousand people (since my AG was end of the swim starts). Run is awesome - great crowds through Central Park and a perfect NYC way to end the race. Hudson swim is super fast due to current but water is disgusting. Bike is kind of cool given they shut down the highway, but road surface leaves something to be desired.