Let me preface this by saying that I think a lot of the haters of this place are just urban hipsters who can't jive with the fact that this is a chain of sorts, thus in their eyes, it can't strive to be the 'quaint, authentic, ethnic experience' they want.
Pho is run-of-the-mill 3-star fare, but perfectly acceptable. Pork vermicelli is my go-to though and consistently yummy. Don't be shy to ask for extra veggies/greens.
Also, through experience, I have found that the Church location is almost always a better bet than the adjacent Yonge shop.