I was having problem after problem when using the built in TinyMCE editor in Joomla. The latest one was the 'Read More' page break refusing to work. So I installed JCE and it actually works fine. A shining light in a very frustrating world that is Joomla.
I'm sure this would be a great plugin. however like the reviewer above, I keep getting 'unable to retrieve document'. I have followed the supplied instructions to the letter and made sure the directorys are correct