I popped by there on Sunday with my friend Alex (who has a car), while I was getting groceries at Hong Kong supermarket.
I ordered the pho dac biet (rice noodles, with beef slices, beef balls, stomach), while Alex ordered pho gai (chicken version). ($5 per bowl).
We shared spring rolls ($5 for 4).
In addition, we each had a coconut juice drink, $2 each.
The pho was good, undoubtedly. But I thought that there was a bit too much fat attached to some of the beef slices. In terms of freshness of ingredients and the quality of the broth, it isn't too far off from Thien Anh sandwich shop, which is my usual haunt on Sunday afternoons. The price isn't that far off as well.
The coconut juice drink was a complete rip-off: they gave both of us three-quarters of a cup of coconut juice, packed with a ton of ice and some cursory pieces of coconut flesh.
Add to that the fact that service was nonexistent, the waitresses were rather impatient and cross, and were rather obviously complaining about us in Vietnamese (I misunderstood, and thought they were serving us the wrong order)!
All in all, the place had a feel of a commercialized restaurant, whereas the next-door Thien Anh felt more like a family-run place, slightly more homey feeling. Not to mention the cheap (and good) vietnamese sandwiches at Thien Anh (they have a Buy 5 get 1 free special), and the friendly service.
If you're just going for the food, I'd say that both restaurants aren't too far off, but if you factor in the quality of the service, then I much prefer Thien Anh Sandwich Shop to pho Dung.