Best flat white in NYC is Au Breve. Hands down. It also may be the only place to offer them but still they are the best.
We discovered flat whites while in New Zealand and made sure we had at least one every day. And lamb. We ate a lot of lamb while hanging in All Blacks territory. You haven’t experienced fandom until you have watched Rugby World Cup in a Kiwi pub. #haka
See you upstate!