They're pretty legit viet food. The broth is full of flavour and depth. Their spring rolls are different, it's more chewy. I'm guessing they used glutenous rice flour or something. I really like that texture.
If it's busy, of course they want to rush you out. That's pretty standard. This isn't big chain restaurant. I mean it's pho. You eat and go. Go loiter somewhere else. I'm used to Chinese environement which does the same thing. Same with ramen places or anything asian that's not bbt or meant to be a cafe/lounge area.