I come here often. It always tastes the same, and it's always good.
Fairly quick service. However, the stinky tofu takes about 15mins to be fried to perfection. The veggies are very pickled and sour. It all tastes lovely with the red hot sauce, if you can ignore the smell haha.
On the other hand, I always get the beef stomach with noodles, because I don't like the beef itself (not just here, anywhere). My family does enjoy it a lot though. The noodles and soup are very good - very authentic. It also comes with a little bit of choy.
I think their hot sauces are very notable for their kick and flavour. Taste a bit before you slather on your regular amount! The one for the noodle is brown, the one for the tofu is red. I haven't had the brown hot sauce anywhere else!