The best tether
This is better than the BD tether for a several reasons. First, obviously, it has two more axes of rotation. So not even the webbing itself will get twisted. This is a pretty minor plus, but still. Second, you have the option of girth hitching the ends to your tools, or using the included Nano 23 biners to clip in. So it's also more versatile. It is slightly more cash than the BD leash, but you get 2 Nano 23 biners thrown in. Lastly, without the biners it's actually lighter than the BD tether. And it's rated to the same strength (if that matters). If you are going for simple I'd say make your own or try to get a hold of the Blue Ice tether. But if you are choosing between the Spinner and this thing, get this thing.