I received this for Christmas back in 2009 but I didn't watch it until this week. For Christmas this year I recieved the 2010 Live London DVD. I watched the 2010 one and really enjoyed it so I straight away opened the box set. I was very annoyed to hear a good lot of the material from 2010 on the 2006 performance. When I watched the 2005 performance there was material from both 2010 and 2006. Yes, there was stuff repeated within the box set. If you split the 2005 gig into four quarters one part is new, one part is he used again in 2006, one part he repeated in 2010 (I even think there were jokes that appeared in all three DVDs) and the last part was featured in his Live in Dublin DVD from 2002 (and it wasn't the first time I heard it then).
I really like Billy but it's made me think twice about buying any more.