I had tried a lot of variation of the food and absolutely loved the Shuhan and Dandan. I love the noodles and sauces they use. It gives it a combination of different tastes that work together in harmony.
I love spicy food and this place really hit it well for me. I also tried the zen salad, rou-jia mo, house beef pancake, zhang fei chicken, street wonton, and the shaozi. Not all of these dishes are spicy, but the one that really surprised me was the zhang fei chicken. I thought I was going to spit fire after eating half of it. Perhaps you can ask for less spice if you can't handle that type of degree. The other dishes were good - but my favourite still remains Shuhan and Dandan.
The one thing I highly recommend is the jasmine tea; the aroma is so rich (The owner told me that they import the tea leaves). I would considering going back just for tea. When I was done, I was debating whether I should chew on some leaves to savour the moment I had left with the tea.