I have many of Leslie Sansone's walking DVD's and I think this is my favorite.  It uses the WATP Belt - and I can't tell if this Amazon listing includes it or not.  You don't have to have the belt to do the workout, but I think it makes the workout more effective.  (The belt velcros around your waist and has stretch cording between the belt and the handles.  I do weight workouts and was surprised to feel some arm fatigue while doing the workout.)