There were two skype interviews. The first was with a girl in HR. It was very easy and fun. I was told I would also get to talk to a member of the creative team, but they were busy at the time. The second interview was with the creative director and it was very quick. It lasted about 15 minutes then I got an offer. Over all it was very strait forward. No trick questions or anything like that. You should be able to talk about other agencies - what you like, what you dislike. Also, they will probably ask you what ads you currently like and dislike. I got the feeling that the interview was more about personality, than anything else.