Excellently produced, filmed, and edited with multiple camera angles, this is a 5 disc set sold in four volumes. This instructional offers the complete Sun Family Taijiquan form (for ease of learning Tim has broken the form into 12 sections, all of which are taught here), accompanied by detailed instructions on posture testing, footwork patterns, detailed alignment pointers and the importance of proper posture, as well as supplementary power exercises. Applications to the majority of movements are demonstrated, but not taught. That would simply involved too many volumes that are out of the scope of the project.
Here is a extensive preview of the DVD set: