The GUI is easy to use and review your dataset pre- and post- annotation. The API also allows easy transfer of files and annotations. Very well designed

1) The continuous upgrades keep improving the tool and make my annotation work faster and higher quality. 2) The filtering options and mass-apply actions make it easy to apply changes across the whole dataset. 3) I also really like the stats views—they help me keep track of class balance. The export formats are standard helping me to fine tune my model easily.

Easy to learn and use. Intuitive for the most part.