This marks the second time a full season of the show has been released in one set (volume 12 had the full season 11 on it). In prior years Fox, in its infinite wisdom, would release sets that had half of one season and half of another on it. It has really been a minor point because in terms of following the show, it is not like it ever has season long story arcs that need to be followed. You just have to have seen a prior episode to get a reference if they call back to something. But for those of us who do get the DVDs it has often meant paying the same price for a set with a partial season on it. So it is nice that they have come around to doing what they should have in the first place. It also makes for a pretty funny joke this season in one of the episodes.
As far as the show itself goes, it is pretty standard with what it has been doing the past few years. It can get repetitive with some of the gags (they do like vomit), but I do think they are still entertaining on a consistent enough basis to keep fans of the show entertained. This season has the controversial story line in the middle involving Brian (chances are everyone knows what it is and the cover of the DVD set basically gives it away) that definitely shook the show (and the fans) up. It also sees the return of Cleveland after the Cleveland Show's cancellation. Like the show always has, it makes fun of pretty much any topic, and because the DVD is uncensored it replaces some of the tamer jokes from the broadcast version with harder edged versions. It is also worth noting that nothing gets bleeped out on the DVDs, so expect all the swearing to be in every episode.
For those who get the DVD set, as far as extras go, there are deleted scenes from every episode, a couple episodes showing the full animatics with the dialogue, and a short feature on the Brian storyline with show runners and Seth Green talking about the fan reaction. Pretty standard for what has been included before.