To my surprise this tiny restaurant is VERY busy during the lunch. If you don't get there before noon, you can pretty much forget getting a table. Hans serves both Taiwanese and Szechuan style chinese food.
I've been there on a couple of occasions for lunch. I would say the food is hit and miss as it completely depends on what you order. On my first visit there, I ordered the taiwanese beef noodle soup. It was delicious! The slices of braised beef were very lean and tender. The soup was very flavourful. However, on the same occasion I ordered the seafood fried noodles. That dish was a disaster. The squid was mushy and overall the noodles were VERY bland.
On my second and third visits there, my coworkers and I ordered more traditional taiwanese and szechuan dishes. My favourite is the wontons with chili oil. I also really enjoy a traditional taiwanese dish called "Ants climbing tree". Of course, the dish doesn't contain real ants. It's basically a vermicelli dish with lots of chilies. I also like the spicy oxtail dish as well.
For me the dishes are very addictive because I really enjoy spicy food. If you decide to try Hans, you have to go there expecting an entirely different style of chinese food. Most people have been exposed to cantonese style chinese food as that is what is most prevalent here. It is very rare to find very authentic taiwanese and szechuan food in Calgary. If you are expecting to find westernized chinese food (eg. ginger beef and pineapple chicken balls) this is not the place to go as they don't have any of those items on the menu.