Just something to consider, this is what is true for our family. Please take with the proverbial grain of salt.
I was one of those debating over which type of education too. The best thing I ever did, besides go to open houses at various types of schools (Montessori, progressive, traditional, public, parochial, was to attend a parent toddler at a Waldorf school and then, in addition , talk with some of the people there. That part is the most important because each Waldorf school seems to be very different. We have two in our area and each has completely different strengths/weaknesses. Really talk with the leader, and anyone else at the school you can form a relationship with, about issues you may be having because you will get a sense of whether or not your values 'mesh."
This biggest thing I am finding for us is that in the ideal situation, at least some of one's home-life values are reflected and nourished by the school. These values can vary from Waldorf school to Waldorf school.
In addition, I found it wery useful to compare environments from these other various schools with the Waldorf schools. So much is "Will OUR child be nourished in this schools particular envorinment" and only you can really get the truest sense of this. Other's experiences with this or that educational will only hel in that you know which questions to ask yourself when visiting. Sheesh, I got wordy oops.
Another two great books for Waldorf (at its best) are "Beyond the Rainbow Bridge" and "Waldorf Education - A Family Guide" both from Michelmas press.