Interviewed today, don't sweat it. I studied for over a month and it was not needed, very laid back and conversational. Some of the best advice I got from someone else was, "Go in, give a handshake, smile, and discuss flying." Study the red instrument oral ASA book and you will be golden on the ifr test and a few tech questions. Know airport markings and signs, and a few systems of the aircraft you are flying. Good luck!