After going through four different candidates, I'm glad I used the Apprentice style interviewing. So far it's 4-0. I found one participant to be in line with my expectations but I believe that person preferred otherwise for financial reasons. There was one that came through well during the interview but ended up being a 'cultural misfit'.
In many ways this approach seems to work both for the interviewer and interviewee. I had a chat with another candidate today and I will take that person through a similar exercise. I think its worth the wait for the right candidate than rushing for someone for the sake of it. Like they say hire slowly and fire fast!