I recently managed to find this DVD and I think it is the best instructional on the Butterfly sweep I have ever seen. I still haven't decided what details have improved my sweep game the most. Carlos Machado's details in his teaching sort of remind me of Pedro Sauer's though I have yet to see an instructional out by Pedro Sauer on the butterfly sweep. Has anyone else been so fortunate to purchase this amazing gem? If so, please share your thoughts.