After using these straps yesterday to move a dryer from outside the back door into my basement, I feel very confident that anybody having trouble (a) does not completely understand the instructions and is not following them; and/or (b) doesn't understand that the strap NEEDS TO BE UNDER TENSION AT ALL TIMES in order not to slip through the buckle.I'm an extremely sedentary 40-ish woman with the upper body strength of a penguin. Moving anything large, even with help, has always been a struggle for me. Using these straps, my brother and I were able to move a dryer down a flight of stairs with extreme ease. Placing the the weight on your shoulders and then using your hands to keep the item balanced, with no need to maintain a grip on an awkward edge or surface, is a complete game-changer.The one big caveat about these is that there is NOTHING that actually permanently secures the strap that goes under the object being carried. That means that if you DO NOT strictly adhere to the instructions AND understand them, you are potentially going to run into issues. If you thread the strap through the buckle wrong, it won't hold the buckle closed. If you remove tension from the buckle, the buckle won't stay closed (since it's the weight of the item itself that keeps the buckle clamped down tightly on the strap). When you're carrying an item along a flat surface, tension is likely not an issue. But when you're going up or down stairs, with the two people on different levels, it's a LOT easier to accidentally release tension... at which point the carrying strap CAN AND MIGHT start slipping through a buckle, with potentially catastrophic results.As long as you are aware of the mechanics of HOW the buckles function, though, you should be perfectly safe. So just make sure that BOTH PEOPLE have threaded the strap correctly AND understand that the strap MUST maintain tension at the buckle. If one side or the other gets slack, that's when the strap may start slipping through.The only thing I would change about this product would be to update the instructions to (a) more clearly illustrate exactly how the strap must be threaded through the buckle; and (b) explain that the buckle must remain under tension, and why.
Rating: [5 of 5 Stars!]