My gosh, whose dumb idea was it to put that tiny hook on the bottom? That made the product such a pain to use! It's a small hook and you have to squish your luggage handle in there, then lift with all your strength by that tiny black strap and then with your other hand while the luggage is shaking below you, push the button in mid-air so you can save the weight.. It took me awhile to understand how to save the weight and then get myself coordinated enough to do all that, especially as a woman who can only lift so much weight! It was accurate though and so though it wasn't easy to use... It worked and I was thankful to have it~!!!