Crossover Symmetry products are incredibly helpful and I have been extremely pleased with all of the products that I have purchased. Also, every time that I call for some advice, I get an actual person from CS and they are friendly and helpful. Great products and great people. I have two separate set ups, on two different doors, with the crossover bands (#3 to 25#) and the door straps, for various exercises and various positions, each station has the appropriate particular strength cords for my workouts. I also have the yellow and red Hip and Core units. As you can tell, I am a true believer in CS products. THEY WORK !!! THANKS CS !!!