I had always seen the figure 8 rappel devices, but I never had a chance to use one. A few months ago I decided to purchase Black Diamonds Super 8 and test it out, and now I am sold on them. This device provides such a smooth rappelling experience, and also creates an amazing amount of friction. I was a little surprised at how quickly the aluminum heated up, but that is only a minor problem. Overall, this will be my go to device in the future.