I went to an open house for the Education Policy and Social Analysis Department back in November where faculty, staff and students in each program spoke with prospective students. I found that the professors were really helpful and frank when answering question and the students seemed excited to be there. It really got me excited about applying. They spoke about their program having a culminating field experience that would have you walk out of Columbia with real hands-on policy experience either by contributing to a research project or working with an outside agency.
As far as speaking to anyone since then, my only interaction has been with the admissions liaison and she has always been helpful and prompt.