Very good value for money, from what I've seen on the net. I use them for bodybuilding. Rings and sturdy straps. For the straps, you must think a bit the 1st time: it must pass below then return to the loop in the direction shown. Delivery a bit long (apparently comes from China), but that respects the specified time. Delivered by FedEx. I missed the passage of the deliveryman. So, I have called the FedEx Customer Service to let me indulge in a Global Relay.