I did the one day seminar and then phone refresher several months later. If the phone prep is all you can afford, it will be pretty good prep. But you can't beat the experience of sitting in a room with people you don't know watching you answer interview questions and watching them answer questions too. I learned a whole lot about body language and word choice from that experience. I worked with Aaron at the seminar and phone refresher, and I think he is great at what he does. You pay one time and then can go back to another seminar or call for phone refresher as many times as you want, and you get your money back if you don't get hired.