After being charged by the airlines for bags over 50 pounds we decided to purchase this devise.  It is very difficult to use your bathroom scale to weigh your luggage.  It also proved to be incorect when we got to the airport.  Of course you can repack but who wants to do that once you arrive at the airport and need to catch your flight.  This device proved to be excellent.  We took it with us on our last trip and it helped us be sure there were no suprises at the airport.  This devise was totally accurate and very easy to use.  When it gives you the weight you can trust it.  It was the same weight we got at the airport.  Just to be safe we stopped at 46 pounds and we were suprised to see the airpot also had 46 pounds on their scale.  If you have ever had to pay for an orverweight bag this item is worth every penny.