I have literally ate here so many times now it's incredible.
So it's 24hrs and has a super cool atmosphere, during peak times there is a bit of a wait but well worth it, I recommend the duck it's incredible, the Mongolian beef, peer steak are all great.
A little tip obviously the pho is what they are famous for however I personally don't rave about them so I just get a side pho broth and it's a great bowl of the broth for $2 and works a treat.