Both of mine went to Yip's. I switched my older one out after JK. Again, their only selling point is really the Chinese language instruction. Their facilities are so so, no racial diversity, not a real montessori etc. The teachers are caring but probably other school's teachers may be better. But both kids speak flawless Chinese at home, can do basic Chinese writing and even still speak Chinese between each other. They never really spoke English to us except outside the home when we are with non-Chinese speaking people.
I think also Safari kids also have Chinese preschool program?