Anonymous. Disks with variations on are two a penny. What I like about the Inovation Collection is in the Cha Cha how they go through everything First they give a group.Then, Dance with timing. Man's timing ( solo) Lady's timing ( solo ) Dance to the music. Poise. Body weight.and movement. Footwork. Leg action and leg movement. Body action and leg. Body action and movement. Characterization of Cha Cha movement. All that and a group to pracice. I think the idea is that this lot comes first, and not to jump into that deep end to soon. Which is what we usually do.