OK let's start with the one positive....yes they do bake their own banh mi so a fresh baked viet baguette which is always a plus in my book. I observed that they make their sandwiches like that cheap ass frugal "subway style". 2 slices of head cheese and 2 slices of cha lua. Little filla and NO thrilla! So if you have a small appetite than it's perfect for you. If your looking for a hearty banh mi....Mekong ain't going to cut the mustard or should I say pâté which they also charge for an extra shmear. Right of course they do!
They charge extra for even a few extra slivers of pickled carrots and daikon! WTH is there is there like a shortage in AZ or something! I have never ever been charged for extra pickled veggies on my banh mi ever!!!!!
Overall it's a mediocre sandwich. Given the limited options for banh mi in AZ. It should take care of your bm fix and I'd return to try their bánh bao ONLY and the pate chaud ONLY when I'm back in the desert.