So far it's the best solution.
I have tried lots of different options from little spring alligator clips, to fancy plastic clips, to magnets. So far this one is the simplest solution and it works the best. It fits the 3/4 inch straps found on the shoulder and sternum straps of just about every brand of modern backpack available, it's cheap, solid, and it is very easy to unclip and reclip the tube. Nothing bad to say. Sometimes the simplest devices are the best.