Bottom line: unusable, buggy

Supposedly a full-featured project management system, UI is awkward, apparently you can assign anyone with an email address to your project but it’s unclear how you assign them a way to authenticate and do things on the project, and the UI for adding an assignee to a task is broken — I added someone to the project and they cannot be added as an assignee. Maybe there’s a way to do it that I’m not getting, but in that case the UI is very unintuitive.