There are other note taking apps out there, but I have always found they are just "yet another thing" to do, instead of making my life easier. My desktop is maybe chaotic, but it works. CintaNotes, however, feels natural and sits in the system tray ready to spring into action whenever you need it: highlight text, hot key, you're done. Easy.
Definitely a good portable tool: notes can be shared with the help of Dropbox. However, what really makes it attractive for bloggers is the tagging feature and automatic URLs saving.