This was bad news. Very dangerous as the strap ruptured and broke with my 70 lb daughter just climbing the ladder. No friction or fraying at the point of the break, it ruptured strictly from load. The kids could have been severely injured... lucky!
I've replaced it with a 10k lb 30ft tie down strap. Some of straps on the activity buckles were showing fraying near the centre buckle. Simply not enough strap to do the job.