It's a panel of 2-3 people and each person asks you about 2-3 questions each. It's mostly about your work experience, how you would handle stressful situation and difficult customer. The main thing I would advise is that you relax and if there is a question you are not 100% sure about you can ask them to pass then get back to it - this at least allows you time to think for a bit. Overall not too bad :)