I highly recommend this. Here's an advice- don't use your bus hop on hop off on the same days you're visiting the museums. The bus hop on has a separate activation so use it after your museum pass expires so u can maximize your time. The metro is a great way to go from one attraction to another.
This was probably the best part of our one week in Italy. Loved Siena and San Gimignano. The farm visit and wine tasting was a wonderful experience. If you're going to Florence, spare a day for this tour.
Our tour guide Lara was very knowledgable. Learned so much from this tour. I don't think I'd appreciate the Vatican the way I do now if I had gone there on my own.