I needed something for weighing items I was shipping on Amazon. This works very nicely. I made sure it was calibrated at both small weights and large and it was as good as my sources. The only "negative" is also a positive. It is small - so weighing a large box, you cannot see the readout. BUT, you can solve that by sliding you finger under the edge and hitting the "hold reading" button and then removing the box. I tried this several times and was always able to get reproducible readings.