Text Importing Bug
This app has a lot of great features, but there is a bug in the primary use case: creating a JSON file.
There is a bug when importing text, in that your imported text wont appear until after a model has be added. To work around this bug, just add a model before importing text. The developer has promised a fix soon.
Otherwise, the app is great, if not a little confusing. Watch the tutorial videos.
brianpartridge about
Cocoa JSON Editor