Pros: It's small, it doesn't need an installer, and it's free ...
Cons: ... but "distraction-free"? I think not! Trying to get the font selection to work is very distracting. The default font looks awful, and the font selection dialog doesn't change it, either for selected text or for the whole document. You can change it by editing the .INI file, but that only changes the global font. Also, there are many users these days, including myself, who use a wide-screen display. This app's window cannot be resized to fit it, so lots of space is wasted, and the text wraps even on relatively short lines -- another distraction.
Other Thoughts: There are lots of better freeware RTF-based editors out there.