Westchester/Greenwich prep schools

My daughter is applying to kindergarten this coming fall. I’d like more info from parents and possibly former students about the schools in the area, especially Hackley and Rye Country Day School. We visited both last year along with Greenwich Country Day. I have plenty of info from the schools themselves but am seeking other perspectives.

Also, aside from this site, are there any other forums or blogs or websites etc. that I should look at for info?