We did the Lavender tour that included a tour of the lavender museum and side trips to Gordes and Rousilon. Small coach and just eight of us made it great. Excellent tour guide who was right on time and very engaging. We did the Papal Palace on our own, which is a must see.
If you're a lover of history, this is a 'must see' in Avignon. It comes with the flexibility of seeing the Pope's Palace at your own pace, as well as the ability to select a half day tour from a good set of choices. On top of this, the guide was very professional and well informed - the mini van was quite modern and comfortable.