You'll meet tour guide at 08:40am at the Statue of Petrarca, right in front of the gate 1 of Uffizi Gallery.
09:00 AM
You can cancel up to 24 hours in advance of the experience for a full refund.
Having skip the line access was absolutely essential to avoid a very long wait in the lines that formed outside the museums.
Having access without waiting in lines at the museums is definitely an advantage.