What a fantastic tour. The drive is a bit long, but our guide made great use of the time by providing a lot of information about the areas we were driving through, and prepping us for the visit to Delphi. The tour of the site and museum were wonderful, and going with a licensed guide was critical to really understanding the site and its history. We were a group of 17 people and the transport was an extremely comfortable Mercedes mini-bus. The driver did an excellent job getting us out of and back into Athens while avoiding the worst of the rush hour traffic. My only negative comment is that after booking I noticed some fine print saying that guided tours of the site are not included for bookings between November and March. I hadn't seen this when booking, and the use of a licensed guide was the sole reason I chose this tour over a number of others so I was pretty upset. Thankfully, we did have a licensed guide after all, but perhaps that's only because we were a large group.