The decor of the store is lacking, but don't let it discourage you from trying it out. I've had lots of pho in different major cities, and this one is pretty much right on par. Not bad, but not great either. The broth was fine, the tendons were super soft (I like mine a bit firmer) and the portion was good.
A large bowl for the standard pho with rare beef, brisket, tendons, tripe, and meatballs ran 8.50, which is about right.
This was my first pho experience in Las Vegas so I can't comment on its comparison to its competitors, but I would definitely say it gets the job done although not spectacularly.