I have several AnD GF-2000N precision scales. They are all within 0.01g @ 300g tolerance. The displays work perfectly, however the Serial port to connect to an auxiliary device is not functional. So, as long as you are not trying to pass information electronically, they are perfect. I used to have a business with many weighing stations, but recently sold the business and now no longer have a need for them. These are over $1100 each new.