Powertec Leverage Gyms have been marketed for fifteen years and stood the test of time because they accomplish properly some very special things in a small amount of space.
First, they provide multiple exercises for all major body parts for a wide range of body shapes and sizes - all types of presses through many angles, excellent squats, including split squats and lunges, with a large variety of pulling exercises such as pull-downs and rows, and a host of isolation exercises, such as focus on the biceps and shoulders. For a pressed or lifted load, they provide steel-pin-secure safety if you want to drop it, and guidance and extra balance in the movement. This makes them excellent for strength training beginners, and yet they're also used by experienced trainers.
In a sentence, they provide the power of free-weight training with the control and safety of a machine.