I like it, in concept. I’ve liked the “mind map” idea since I ran into it.
Mind Raider is slow to move from note to note on my machine. Maybe it’s because my X server is running unaccelerated. (Which sucks for various reasons and is currently unavoidable.)
The deal killer for me was the note entry mode. If I want an item bolded I have to type <b></b>. To do other rich-text stuff you have to enter similar HTML. Ick. Won’t do it. Sorry, I’m picky.
Before I dismiss it completely I should probably check to see if there’s an actual rich-text editor plugin, though.
In the mean time, I’ll stick with TreePad.