Mike Schmitz wrote a fantastic app review for us on The Sweet Setup in our pick for the best Mind Mapping app (for iPad and iOS):
MindNode has the perfect balance between beautiful design, ease of use, standard features like iCloud syncing between your Mac and iOS devices, and import/export features to make it a functional part of any workflow.
The best thing about MindNode is that it is incredibly easy to use. The UI is simple and intuitive, even if you’re not an experienced mind mapper. In fact, you could probably start using MindNode without even fully understanding the concept of mind mapping because the user interface will actually teach you how to do it.
MindNode is awesome — I use it regularly. It’s basically my office’s white board and then some.