There are 3 Pho restaurants I would recommend going in the Richmond Hill/Markham area, and this is definitely my #1 choice.
When I go for pho, I pretty much 95% of the time order a raw beef noodle, so I'll be using this as a reference to compare all the Pho places I go.
The key winning factor here is the taste. Although the beef quantity isn't that much, the soup base is superb, and there's a fair amount of noodles. One nice little touch I like about this place that others don't have is that they add in a pretty big piece of raddish which I love, especially after they absorb the soup taste.
Definitely the place to go for pho if you want a good tasting bowl of pho.