I've tried lots of Mind Mapping applications on multiple platforms over the last 3 years, and this wins hands down - things like the branch proposal system, flexibranches, the screenwriting module etc are not available anywhere else.

The graphics libraries are excellent quality. The program is easy to use. The ability to assign project management aspects (checkboxes, priorities, resources, times etc) and to load the files in Merlin project manager is really cool.

Development of this software is going on at an amazing pace. Their support team is highly responsive and helpful.

By all means have a look at their competition, MyMind and Freemind - I think you will come to the same conclusion as I have - this better by far (and keeps getting better at a faster rate)