The Yang Lu chan Tai Chi form, is the mother of all Tai Chi. All the modern styles can be traced back to this form.
It is the Old Yang Style. And so, still has all the real martial principals with in it. Unlike all the modern forms, which have been watered down into just a health form. This form is mostly slow moving, but also has explosive Fa-jing movements, leaps, and Kicks. So it is a very well balanced form. Not just all slow.