Kirin serves authentic Hong-Kong style cantonese food and the prices are resonable (around $8-10 for each dish).
The restrauant is locateded on Mtn View's downtown Castro Street, where there are many other ethnic restrauants, cafes, and bookstores. There are typically lots of people during the evenings--even on weekdays--so Kirin is typically full at night.
The cuisine is good--not top notch--but for the prices they charge it's a great value. Some of my favorites: the seafood chow mein ($7) and the mongolian beef ($9) are great dishes. You also have to get the kung-pao tofu ($7) if you enough people with you.