If you're looking at this I'll assume you've either purchased, watched or heard about the previous release "The Laughing Man" if you haven't, get out of here and check that out ;D it might help you make sense of this.
In short this the Second series mushed into a roughly 3 hour film with clips from the show. That leads me to the biggest disadvantage - No new footage, it really dissapointed me.
However, it is fantastically presented, if you've never seen the second series then this is a great way to experience the main storyline, if you have, this is a great way to refresh your memory, to have the ability to watch it all in one night is awesome =]
So credit to them, they did a great job and deliver the experience very well, but it just doesn't do enough to warrant a purchase...the second series is fairly cheap on play.com, and its far better to watch all of that than a compressed version, ne?
Still recommended though ^_^ I've seen pretty much everything and still found this entertaining