For me the Ultimate DImension is an interesting listening experience and it gives a nearly perfect picture of one man's practice and views of Buddhism. But it dwells too much in his interpretation of what the Buddha's sutras mean and not quite enough on quoting the sutras and letting the listener/reader distill the lessons for themselves.
I would be more pleased if Hahn intermixed the Buddha's actual words with his discussions of how they can be internalized and implemented in practice but throughout the entire 6 CD collection there is little of this.
If the reader/listener is intimately familiar with the Lotus Sutra and other Buddhist texts then this advanced retreat would be a perfect addition to his or her collection. But if not then it is quite like looking at the reflection of a beautiful scene and not the scene itself.
One humble opinion.
Written by Zen Master Thich Nhat Hanh, nominated for the 1967 Nobel Peace Prize by Martin Luther King Jr., The Ultimate Dimension is an audio book on CD that examines two classical Buddhist texts, the Avatamsaka Sutra and the Lotus Sutra. From essential Buddhist principles to wondrous interconnection of all that exists, to the "ultimate dimension" that is the infinite realm beyond birth and death, The Ultimate Dimension reminds listeners of the Lotus Sutra's promise - that regardless of one's traditions or background, all beings share the potential to become enlightened. A compassionate, profound audiobook with a quintessential Buddhist message of wisdom, understanding, and learning to open oneself to a higher way.