I've watched a lot of Errol Morris and liked the Interrotron interviews but after awhile I noticed there's a certain feeling of artificiality, a feeling that there is a strange mechanism at work in between the two people.
It seems this technique is getting more pervasive. With such interviews, I always got the feeling these people are talking to a machine. Now that I learned about the Interrotron, I know they are talking to a machine.
Perhaps, but it’s an interesting concept (used to great effect in Errol Morris’ interview films with Robert McNamara and Donald Rumsfeld, among others), and they explain a DIY approach at the end.