My interviewer was not a particularly pleasant person, and seemed to seek out ways to trip me up in my line of reasoning. Just as I'd get rolling on a topic and become excited about it, he would cut me off and send me off in another direction. When I'd begin to put together a cohesive picture of the thought process that I sought to illustrate, he'd deliberately interrupt me and make sure that I could not complete my comment.
The tour was disorganized and essentially worthless. Guides did not know which rooms would be open, nor were they particularly knowledgeable, as MS1s, about the school. I don't know when these schools will begin to realize that MS1s do not give good tours when they are 2 months into their first year at the school. Several folks did not show up for our tours, and the day felt like it had been put together 15 minutes before we arrived.