Both of my children attend Carrig Montessori. I am a public school teacher myself, and they are the best teachers I have ever seen. Everything there is done so thoughtfully and purposefully. Just an example: new kids are phrased in one at a time so each child feels maximally special on their first day. My son started class in the fall knowing his letters, and in two months he's now proudly reading books to me. My daughter never willingly left me for any reason, but she loves to go to school and waves happily to me each morning.
They come home each Friday with the work they have done and are so proud to show it to me. They talk to me about things I had no idea they knew. A big part of Montessori education is the kids making their own choices of what work to do, and I'm really enjoying how much more independent and self sufficient my children have become.
The parent teacher conferences are amazing. After my scheduled classroom observation, two teachers met with me for *an hour and a half* conference in which they describe my children's relationship to themselves, their peers, their teachers, physical space, all the different subjects (practical life, language, math, etc). I learned so much. A few very specific examples: they noticed that my 3 yo daughter's Vs sound like Ws and are working with her in the movable alphabet to see if its a problem hearing or expressing the sound. They notice my son gets distracted 75% of the way through a work and they check in with him to give him the final push to complete his work. I don't think that level of detailed perception and follow through happens at any other preschool (any school anywhere?) Before Carrig, my kids had been in 4 other preschools and 1 elementary, so I have some basis for comparison.
Carrig is truly a one in a billion school. Christine Carrig is committed to running a school that is excellent in every detail. Even if it is geographically less convenient for you, you should think about sending your child there because it's your kid and it's really worth it.