The interviewers were fairly laid back and definitely not too intimidating. Seemed like they were more interested in exposing my strengths than my weaknesses. They did not give me any sort of live coding example although I've heard that others were given one. In the beginning of my interview I was asked all about my background and experiences including favorite languages and projects I've worked on. Then they moved on to some pretty standard object oriented questions just to make sure I knew the basics of CS. After that they just wanted me to ask a ton of questions, which you should definitely have prepared for them. All in all it wasn't a bad interview at all and you shouldn't be worried about it. Just study your object oriented concepts the night before.