I'm a vegetarian--let's just start there. The only reason I ended up at Xinh Xinh was because I'd been told that it existed and because I work across the street. I have enjoyed both the summer rolls and the spring rolls so far, and I must say they are delicious! The summer rolls are particularly so; they have tofu and fresh veggies wrapped in rice paper. The peanut sauce could be a bit less salty, but I can survive. I've also had the fried spring rolls, but those weren't as good; they seemed not to have much in the way of veggies and the vegan sauce didn't have much flair. They were deep fried a bit too much and I ended up with a stomachache. The bubble tea is as good as any; plenty of bubbles but could be a bit stronger. I had the papaya.
All in all, certainly a place to try, but don't expect a full meal if you are a vegetarian! Nowhere near as good as the Vietnamese food my friends have made me, but for Champaign-Urbana, it's probably among the best.
Another note: they aren't open very late, so keep this in mind!
Update: The tofu stir fry sandwich single handedly made me change this. That, and the vegetarian pho that Shai has once a month! Yummy!
This has become one of my #1 places for food on-the-go.