I have been using this extension for more than a year now. Tried it with joomla versions 1.6 1.7 and now with 2.5 and it works really fine. I like it because it supports many formats and it is really easy to use even for someone who doesn't have much experience with html. Really straight forward and nice sort and clear documentation.
Really recommend it.
Great extension + it is free...
A big thank to the developers.