Pho Bang New York is the more-or-less the best pho place in the area (and there are a lot of them in Chinatown!). The noodles (pho) have a good texture - soft and chewy. The soup could be more flavourful though, but that's just because I am used to the unreasonably high standard of pho they have in Toronto.
The service is not very good, but that's mostly because they're too busy most of the time. It might take a while to get the waiters' attention. You should also expect a wait if you're visiting at lunchtime or dinnertime.
Their sign has a weird font so it's harder to spot. The words "Pho Bang New York" is located on a separate sign on top of the normal rectangular plastic sign. If you're having trouble finding it, it's the shop literally right next to the dental clinic. It's also the second shop to the right as you walk north from the south gate.