Hello Lesley,
I did the Discover Sicily tour last year. I put up a review,
Discover Sicily 15 September 2015
which you may have read. If Roberto is your TM you re in excellent hands. The main thing I noticed about him was that unlike some TM's that sit and read from a crib sheet, he knelt on his seat and looked us while he was talking - no crib sheet for him. This meant that if we had any queries we could easily catch his eye.
It is a full tour and got hot - we hit 39ºC a couple of days.
Will be interested to hear what you thought of it if you decide to go.
Sylvia