Yes-Sir--I own, and use the premium one. I am in no way affiliated with them, but highly suggest their product. It works, and works well. I have fully tested it, and it not can, but will save your life if you should ever have to count on it. Ask yourself--how much is your life worth? I always tell guys--if you survive the fall it's what happens next. Not just the the person who falls, but those who will be effected by what happens next. Major medical bills, major rehab, and bills, lack of income to pay bills, and support those who count on your paycheck. Time required by others to take care of you. The pain isn't just touching the one who falls, but the emotional pain by those around you--wife, kids, others. A treestand fall WILL--I repeat WILL-- change a persons life for a long time--maybe forever, and many around you that you may not even have thought about. If you have to ever count on this device, or similar one--it will have just paid for itself many times over after just one use.
I implore ANYONE who hunts from elevated portable treestands to take every precaution to prevent a fall. This device is worth every penny.