They're great. The cheap, no moving parts, the simplicity is really compelling.
Also, both parcourse elements (stations) and stimulus are essential components of any real fitness.
But, the physiology of high intensity external object control (weightlifting, throwing, martial arts, etc.)is different than the physiology of gymnastics and also essential. (I'm itching for a debate on this.)
So, I need an O'course with either big rocks, heavy dummies, sand bags, or logs.
Let's brainstorm the "perfect O'course."