I worked with Kaiten two years, before I became the part of Kaiten team. It's trully AGILE tool. You can visualize any workflow in seconds.
If you really want to visualise work process of your team without making 1000 clicks like in Jira, TFS, etc, Kaiten - is for you. Fluent interface for creating boards on the fly help truly agile teams to visualize their work processes, run scrum, gather Kanban analytics (Control Chart, Spectral Chart, Throughput, Lead time, etc...) and collaborate more effectively.
We are first who introduced unlimited hierarchy of kanban-boards, that allows to visualize all your company workload from strategy down to employer.
Our engineering team has been using Kaiten since day one of our product birth and there is no way we are changing it to something else.
I use Kaiten for over 4 months, it helped to remove "software zoo" and to mprove my multy-projects workflow
We've tried Jira, trello and others. Kaiten brings the best of Jira and the ease of use from Trello, everything is just "cards", and you can organize it how it fits. It's easy to change the workflow and be agile with Kaiten.