If you went to UChicago, you will get the job. The interview is extremely informal. ADV will tell you to come in, and tell you not to wear anything too formal because this place is "casual, haha." You will show up in business casual anyway. He will be in a t-shirt and khakis (with white tennis shoes). He will look at your resume, ask you the basic questions, to which you candidly answer. Then he offers you the position. Sometimes he will ask you to speak with another employee. I recommend asking to speak with an employee in your position to see if you can get to the truth about this place.