I have travelled extensively and have been on many tours including walking and I have to say that the guide today was the best I have ever had. His passion was evident in the way he delivered the information and his knowledge extensive. He handled the dual languages with ease and to avoid anyone feeling left out. I'm so glad I chose to go on this tour as I feel I have learnt a lot today about the Sicilian people, their history and the fight against the Mafia's stronghold. 
Thank you Stefano and Addiopizzo, you prove that one person/organisation can indeed make a difference.