I found Robert Thurman to be a Great Teacher of "The Jewel Tree of Tibet." I've not only learned a great deal about Mahayana Buddhism within these twelve CD,s, but I enjoyed enormously the good humor and liveliness that Robert Thurman gives the teachings. I have listened to all twelve CDs numerous times and each time I learn something new and have fun listening to them. The Jewel Tree of Tibet is not for the beginner, but I highly recommend anyone interested in Buddhism or who is a Buddhist to listen to this wonderful teacher explain The Enlighment Engine of Tibetan Buddhism.