I've interviewed for four positions at Columbia in the last year and none of them were particularly great experiences.
Interview #1 - hiring manager asked typical interview questions and was extremely rude (even more so on the phone, I shouldn't have bothered with an in-person interview). Then she introduced me to various team members and they were all very awkward and disengaged. I was never contacted again, but HR website said the position was filled. Then it was relisted a few months later. It sounded like a high turnover job and I wasn't surprised.
Interview #2- an admittedly bad fit. It was just obvious. People were nice though and I received a polite rejection email a week or so later.
Interview #3- met with a very nice departmental administrator and was told second interviews would be conducted in another month. That was 6 months ago and I never heard anything else, although according to HR the position is still open.
Interview #4- met with former person in the position (who was promoted) and departmental administrator. The first person was nice and answered questions and we had a nice conversation. She gave me a good sense of the job. The departmental administrator was a total jerk. He barked at me when I wouldn't answer my salary requirements (I said I was open to hearing their range) and kept asking me in different ways. If he hadn't been so persistent I would have probably just told him, but I found him to be really rude. Then he asked a bunch of extremely negative behavioral questions that were just bizarre. At the end he said he would have a sense within a few weeks what 'direction they would be going in,' and whether they would need to repost the position and get more candidates. Uh… I guess that was my rejection because I never heard from them again.