My child attended a Reggio Emilia style preschool. It was a great fit for him and many of the students went on to great success in public school later on. I think his class of 20 students ended up with 4 valedictorians by the end of high school.

We chose it because it worked well for his personality type and learning style but also because we could afford it. It cost only about 1/4 of what the nearby Montessori school was charging. Our preschool did require about 6-8 hours a week of parental involvement, so didn't work for everyone. In exchange, I think we paid something like $300 a month for 3 days a week about 15 years ago.