For those who are curious about the contents of this box, there are two basic specials. First, there are several interviews on location, where it is mostly Lee Mack and Tim Vine talking, which helps give insight into how the show was conceived and how it is shot. Secondly, there are audio commentaries on some episodes, which is fun, but they only have them on half the episodes of the first two seasons, and none on season three and four.
Overall, it is priceworthy for such a fun show, but they really should make more specials, given how easy it is to make and how long it is between seasons. My favourite remains Miranda Hart, so I hope she returns at some point.