After reading all the reviews here I purchased a Groupon Now and decided to squarely face the "unknown".
I told the wait staff that we were using a groupon and that we would like the compulsory service policy explained. They do charge a 12% service charge, which is clearly outlined in the menu. For a "Pho" place they also have wi-fi which we did not use.
I ordered a tripe Pho and Judy ordered a Pad Thai. The XL Pho is very large although I have seen larger. I was given a nicely flavored Pho, but it was Beef Tendon. When I mentioned this to the wait staff they brought me a plate of steamed trip almost immediately. My wife's Pad Thai (one of her favorite dishes) was excellent. My soup was good, perhaps not the best Pho I have had, but good and clean food.
They do have a Groupon order form when you tell them that you are using a coupon and it makes things easy and simple. For dessert my wife had a chilled Vietnamese coffee which was excellent.
All in all a place to go back to occasionally. They did give us a coupon for $5.00 on our next visit.