Arrive early, no less than 15-20 minutes early. They give you a number to call when you arrive so you can be escorted through the building with a staff member, I love how safe the environment is actually. When they take me to the back (they were a little late but better them than me) they greet me. I'm interviewed by two people, one not in the state so sort of a conference-style meeting. They're pretty forward and straight to the point with their questions. They allowed me time to think and process my thoughts before answering--they seemed to prefer it actually. Ask questions, good questions, things you want to know about the company or the work. I'd never worked in a call center so I was very curious as to what it would be like, they were honest with me about how stressful it could be at times and made sure I was okay with that. Towards the end of the interview (this took around 45 minutes), they seemed happy with me, I knew the interview had gone well, they gave no indication during my interview but after it, I could tell they were satisfied.