I frequent this place whenever I'm in the downtown area. It's probably one of the top two places for pho in all of Toronto. My relatives who grew up in Vietnam debate whether Pho Tien Thanh or Pho Dau Bo on Finch Ave West serves the best bowl of pho in Toronto. One sign of authenticity that you will notice is that a lot of Vietnamese people eat here because of how good and authentic the food is.
Normally I order the Pho Dac Biet (special) or Pho Ga (Chicken).
The pho is near perfection. The broth is excellent, the noodles are always cooked to perfection (not undercooked or overcooked), the quality of meat is really good, thinly sliced and not filled with fat like other places that are trying to cut cost. The tendon is of a nice quality. The accompanying vegetable plate always has fresh bean sprouts, mints, lime and sawtooth herb which many places skimp on.
Service: The people are really nice but sometimes the delivery of the food while dining in can be quite slow which is a little puzzling for pho.
Decor: Minimal decor, washrooms are borderline clean but ppl come here for the great food and not the ambience.
Pricing: A little bit more expensive than other pho restaurants but not by much and the portions are a little bit smaller.
Interesting note: I was talking to the owner and he told me he use to own a Vietnamese restaurant called Viet Huong on the S/W corner of Sheppard/Brimley in Scarborough over 10 years ago. If anybody remembers the place, it use to be one of the go to places for pho in Scarborough way back in the day.