I have all 18 DVDs and just ordered a new one - Sight Power in Combat. Looking forward watching it! Each DVD is a great addition to each other. Every time I learn something new. Systema Spetsnaz has simple and unique fighting concept. There are a lot of details and each DVD opens new possibilities! My favorite DVDs are: #5 - Internal Wave Energy, #7 - Wrist locks, #8 - Takedowns, #10 Energy strikes, #17 - Combat Flow and #18 - Instructor's course. They don't have a school in my area and DVDs is a great alternative to learn it!