I have used this video almost since it first came out. I refer to it frequently when I am confused or do not remember a move.
It is very well organized. The first disc introduces you to Tai Chi, has a short group demonstration, and presents the entire 108 movement Tai Chi form giving a clear introduction to this martial art. I find the second disc most helpful and often turn to it to refine my steps or rekindle my memory.
I appreciate that Pat shows the movements from a different direction because that makes it easier to follow. I find the location by the ocean and the gentle background music add to the quality of the presentation.