I highly recommend that day tour! The value for money is incredible, as the quality of the tour was above all my expectations (in terms of comfort, organisation and information provided). Our guide Stefano did an amazing job! He was highly knowledgeable and engaging and made that tour both interesting and fun, thank you very much Stefano!
Additionally, having booked the tour without lunch because I am a vegan, Stefano and the coach driver Francesco brought me directly to San Gimignano after Siena, allowing me to spend more time in this amazing city and find food that I wanted to eat (I went to the agriturismo "I Pini," highly recommend it too!). I very much appreciated their kindness and professionalism!
Vegan tip: book the tour without lunch and go to I Pini in San Gimignano! ;-)