It works fairly well although similarly to AjaxWrite, I would consider it more as an alpha/technology preview than a real complete application. It's still quite buggy, incomplete and missing important features.
Fantastic use of Mozilla platform and promising applications. I hope that the creators would consider changing the name (I hate the term "Ajax" and end-users don't particularly care; unless the guys are trying to use Ajax as a corporate name).
A new application every Wednesday at AjaxLaunch.com.