We are looking at buying one of these. It suits us because it takes up so little room. Does anyone have any experience with them? F7 Introduction.mpg - YouTube
Skip it...better to buy a chinup bar and bodyweight work. You could also buy some kettlebells and or a sandbag and still be way cheaper and get a far better workout.
Eating primal is not a diet, it is a way of life.
PS
Don't forget to play!