1. Other machines only give you a 90 degree range of motion, but the Ab King Pros secret is its amazing 200 degree range of motion that targets your upper, lower, middle abs and obliques all at once,on the way up and down. 2. 3. offers proper neck and back support, keeping you in perfect form. 4. offers different ranges of motions for different levels of resistance. 5. It is perfect for every fitness level, it has levels for the beginner to the most fit exercise buff. 6. It folds for easy storage under your bed. 7. It has a fully adjustable sturdy frame, thick padding for superior support and a rolling wheel action, that allows for a smooth consistent motion.