Voile straps are better
These things are decent, but the Voile straps are cheaper, and better. Voile straps are available longer as well.
All said, though, these things will help in a variety of pickles, and most likely never when or for what reason you'd expect. Throw one in your pack in the BC or in your pocket on the hill. The day you don't bring one, is the day you'll need it. Murphey's Law.