I LOVE this place! The first time I went here a couple of years ago, I went at night and hated it. There were people harassing me outside, and the place felt seedy. A friend dragged me back during breakfast hours and the scene was totally different. The service is quick, the food plenty, and while the crepe is too stuff with ingredients to be really called authentic, they are yummy! Now, I'm there every weekend morning to eat breakfast.
For the reviewer who commented on the staff, they are very friendly to regulars (and it doesn't take long to be one). The non-smiling thing is a cultural trait, you should overlook it, after all, this is San Francisco! It matters more that they remember your face, and are very accommodating with any request. Trust me, I'm there every weekend!
Pros: Inexpensive, Great food
Cons: Not safe at night, Cash Only