Because it is more comfortable and easier to use on a stable and safe platform, eliminating the hassle of free weight barbells and benches which tend to fall over and potentially injure you.
The Booty Builder ® also provides a maximum range of motion unlike any other machine or free weight currently on the market, which is important for an optimal training effect!
The back rest and pulley system is fully adjustable to fit everyones individual biomechanics and preferences.