As far as I'm concerned, Pho Van Van is the best pho restaurant in Ottawa. I have eaten here at least twenty times. The broth is consistently hot and delicious, appetizers are great (try the fried tofu) and service is always prompt and friendly. The interior is also really nice and cozy -- lots of wood everywhere.
One odd thing about the restaurant is their 46+inch TV. I'm not sure why it is necessary but if your date goes south, you can always focus on the hockey game I suppose.
Also, my partner finds that sometimes the rare beef pho is not quite rare enough by the time she starts eating it. Perhaps you can ask for extra rare.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.