I interviewed last week and I thought it was great. Stay with a student if you can so you get a chance to see the dorm (it's extremely cheap for upper East Side and thus a big selling point).
The day is very low key. It's a small group (we had 8). The dean is from Queens and absolutely hysterical. He was by far the most entertaining part of the day. They do a nice presentation and then you have two one-on-one interviews. My interviewers were great. One asked a lot of specifics about my application while the other just chatted with me for a while. They were very nice and had great things to say about Sinai. After interviews you get two tours (which looking back is a brilliant idea). The first tour is by M1/M2's and they take you to lounges, and lunch, and the anatomy lab (which overlooks central park by the way), and the dorms, so you can see the student perspective. The second tour is by an M4 so you can see clinical facilities including hospitals, etc.
All and all laid back and relaxing. No big surprises. Good luck!!!
(in case you are curious, and because I know somebody will ask, I was complete in September, invited in October, for an inteview scheduled last week)
