More or less relaxed style of interviewing. Professional, but not overly cold and sterile. My interviewer was nice. Be prepared to answer behavioral and scenario questions like "tell me about a time when you handled a conflict" or "What would you do if a someone __." It lasted about an hour. It is okay to take some time to gather your thoughts. When I had to take a minute, I was told that everyone does. I think practicing those behavioral kinds of questions beforehand helped since I was able to apply it to some of the questions they asked and didn't feel as flustered. Some questions caught me off guard, but that is kind of expected.