The ability to have arbitrarily deep nesting along with the efficient and information-dense visual organization make this look pretty interesting.

Trello is just too simple to capture the complexity in any project of reasonable size, and JIRA is a maze where you really have to know what you're looking for.

We have been using Plectica[1] to plan together and keep track of progress. It's not perfect, and sometimes it's actually too flexible, but in the end has really worked for us.

[1]: https://plectica.com/welcome/technologists

I used Trello to manage my projects, but a few months ago, I discovered Quire. It's pretty easy to use and it has a list view. Which is great for my teams to dump ideas, and i can moved them to board afterward for tracking the project's progress.

One of the best task management app I've ever used. Not a fan of their theme choice though but overall, it helps me with my work. Simple enough to not create any confusions.