Just like Hongkong Wok, I'll make this review straight forward, no BS needed.
Straight forward, cheap, free parking, and delicious and comforting! One of the two most authentic Chinese restaurants beside Fugu (authentic is the keyword here). I won't dare to compare it to the real HK foods in HK, but it's so good for Midwest standard. That's all I have to say about HK Wok.. I love the noodle soup with beef stew, salt and pepper pork chop on rice, beef with scrambled egg on rice are the musts. On weekends, we loved to go there in the morning for the dimsum (yeah, the only dimsum place in Madison) for the tripe, pork congee, chicken feet, fried chinese donut, chow mien, and soy milk.
Don't expect a good service here, which gives the more authentic feeling. Seriously, if you've been to HK, you'll know that bad service is part of the culture there..