Versaclimbers, minute for minute, provide the best, most grueling cardio workout, plain and simple. They are best suited for intermediate and advanced fitness junkies. Someone who is just starting to (or just getting back into) working out will wear out fast on this. They provide a total body cardio and strength workout. It is a popular machine in UFC Gyms. They've been around for awhile and flimsy knockoffs are everywhere, beware! Read this article on the benefits and the efficiency of Versaclimbers.