The recruitment seminar is really relaxed and you will get through it as long as you be yourself, engage with the recruiters and other people there and ask plenty of questions at the end regarding the job. Don't come over too much as a hardcore Apple fanboy but talk about how much you can't put down your iPhone/iPod. During the group exercises, make sure you try and come over as a good leader but good team player at the same time - make sure that your ideas are part of the main focus but be sure to agree with ideas that you wish you though of. Otherwise, just enjoy it as it's really relaxed and you will spend most of the two and a half hours watching a presentation, videos and doing some group exercises. They get through hundreds of CV's at a time and to get the chance to be considered is a good achievement. Just out of interest, what store are you thinking of joining and what position are you after?