Fairly easy. You check in, and they give you a temporary badge. Someone will walk you to the room for the interview, and away you go! Mine was fairly straightforward, and the group I work with is filled with great people. So for me, it was an easy interview.

I was a really easy, yet slightly more involved process. They tell you exactly where to go and who to talk for, Then, someone escorts you to the interview location, and it's all standard from there.