I took a chance and purchase this scale.  To my delight, it was worth the money.  It is very precise to the pound and 99% match the scale at the airport.  It's been off by less than half of pound which is very good.  You have to ensure you attached the scale to the center of the bag.  I normally turn my luggage on the side and attache it to the handle.  It balances better.  If you use the handle where your pull up bar is (top), it takes longer to weigh.  Also,  it takes a few seconds, even a minute to get the weight.,  Don't think once you pull up the pounds will appear immediately.  You have to wait to the bad stops moving, meaning you have to stop moving as you lift and hold, and once the bag is still for a few, the device will show you the weight on the scale.  It's light weight, small and easy to place in your check-in luggage taking up very little room.