This is my parents' favorite place to eat when they come to Phoenix so we dropped by twice on our family vacation. The owner/proprietress convinced my mom (in mandarin) to let her pick the dishes for our first dinner so we didn't even know what would be coming. The cold smoked duck was sooo delish as was the special mountain leafy green with bean curd shreds (all minced fine and not on the regular menu). There was also a shredded pork dish with bamboo (excellent) and a pickled vegetable with fish soup. The soup wasn't really my thing because it was heavily seasoned with white pepper which I hate but the rest of my family said it was exceptional.
Our second visit was for lunch before heading off to the airport for the return trip. I could have eaten the entire scallion pancake myself as well as the cold spicy pork belly dish. Luckily, we ordered two orders of fried potstickers because those were delicious as well. We also had some tasty steamed pork buns but I was stuffed at that point.
If you really want to experience authentic shanghai food, let the staff order for you, you won't regret it.