The accuracy with 1g is more theoretical: Did my children weighing 1 gram of fine granulated sugar. We have simply not done. Either showed the scale or 0g 2g. But never 1g.
But if you please: This is a good kitchen scale that still loose enough to Briefwaage. There is an accuracy of +/- 1g more than adequate.
Not so successful are the buttons (touch buttons), as they react sometimes sluggish. They want to be pushed and not merely "getatscht". But otherwise: up device, wait 1-2 seconds, the measuring vessel on it, press Tara and after 1-2 seconds can loswiegen.