I have so far only used the free version, but I have thought many times I should buy the premium version if for no other reason than to support this great company and product. But with the free version I have all I need. I just use this for personal use. Where I currently work, they're already invested in Atlassian JIRA, so I can't influence them to purchase KanbanFlow, but if I am ever at another company or job where it comes up, I would enthusiastically recommend KanbanFlow. (Because compared to JIRA, KanbanFlow is so much easier and faster to use). I use this to track my Personal To-Do's and to track my Work To-Do's. I'm a software developer and when I get hot and heavy on a large complex project, I break down the work into tasks on cards, and it helps me organize and focus so much more. It's very easy to set up a board and add cards to it. I use the subtask checklist a lot, and I sometimes use the color coding too. It's so easy to move cards around the board. I haven't needed or tried to track history on a card, or track time, but those features (especially the time) seem to be available. The mobile website is great too, and I am able to move cards around or add/edit cards using chrome browser on my andriod phone, and it works surprisingly well.
Easy to use and fast. Setting up a board, adding entries to it, moving them around, is incredibly easy, intuitive, and fast.
Adding labels is a little slow. I wish I could add labels to cards more quickly and easily. As a result, I don't use the labelling feature much.
Value for money
Ease of use
Likelihood to recommend: 10/10