I'm not from Montreal and was staying downtown but decided to make the trek to Nguyen Phi because of folks saying it was the best pho in town. Unfortunately those folks saying that were wrong and Nguyen Phi is nothing special compared to other places in the neighborhood and in Montreal.
Getting here via public transportation is a pain because it is not close to the Metro and you need to connect to a bus. I arrived around 5pm on a Thursday and the place was empty. I got the traditional #11 Pho Dac Biet and it was cheap at c$8.99 for a XL. It took about 3min and my Pho was ready. OK sized portion but I did get the XL. Broth was OK but nothing special. Same with the noodles, beef pieces, meatballs, tripe. Service is OK. Not a bad bowl of pho but average and plain would be the best description. Also the only hot sauce they have is sriracha. I usu prefer the hot chili sauce where you can see the pepper bits.
At the end of the day, I don't recommend the journey to Nguyen Phi if you are not in the area. I actually think Sen Vang which is close by is a better Pho shop, esp the spicy beef noodles. Go there instead