I'm no pho expert. I've only had it a couple times in my life, but Xinh Xinh makes some pretty good pho in my opinion. I had the combination pho which came with a variety of meats including some raw ribeye which cooked beautifully in the delicious hot broth. The pho came with the standard pho accoutrements: basil, lime, and sprouts. I also had the lime soda which was nice and refreshing, but I'd probably skip it the next time I visit. Seems a bit overpriced for lime, sugar and club soda in a cup.
I've also had their banh mi. The bread they use is great, crusty on the outside, soft and tender on the inside. Their combination bahn mi is a little funky which I attribute to the headcheese and pate, but it's mighty tasty. The pickled vegetables are great although I feel my sandwich had a bit too much and some bites were just bread and veggies while some were just meat and bread. However, when you do find a balance between all of the components it makes for one delicious bite.
Xinh Xinh will be my go to for Vietnamese food, although I don't believe there are many options for Vietnamese food in C-U anyways.