Being a San Jose native, I know Pho and Vietnamese cuisine. Let me tell you, Khai Hoan is excellent. Definitely the best I have had in AZ and comparable to the best noodle houses in San Jose.
The pho (rice noodle soup) is great- beef or chicken. The dry noodles and rice dishes are generous portions, and very tasty. Great ingredients in everything. Make sure you get an order of spring rolls. . .
If you have not had Vietnamese food, check it out! It is fantastic. If you have had Vietnamese, go to Khai Hoan and you will not be disappointed.