In my solo law practice technology consulting business, I use MindManager nearly every day to brainstorm, organize and present projects. It is especially effective at sorting out thoughts, issues and processes.
I view MindManager in a class by itself. There are other mind mapping tools, but from brief tries, I find MindManager works best by itself, and in connection with Microsoft Office. Compared to outlining in Microsoft Word, for example, I always turn to MindManager first.
MindManager works best when beginning to think about an issue. While it can (and should) be used for presentation of ideas, it is not a replacement for writing a clear report. Often the MindMap serves as an outline that works along side written content.