Includes advanced Image/Media, File and Link handling, plugin support, and an Administration interface for editor configuration.
It is superb, masses of useful functions, it is compatible with all versions of Joomla and in the years I have used it and I have had VERY few cross browser compatibility issues and it even notifies of available updates via the joomla installer
Being new to Joomla I'm still getting used to the various features; navigation and links in particular. JCE really does take the pain out of creating internal links something that was beginning to cause me something of a migraine.
Unlike one or two extensions I've tried it installed seamlessly and within seconds of the upload I was working with it.
I also enjoy the setup of different profiles. So you can have different buttons for unregistered front-end users. The commercial plug ins are also worth buying! The image manager is really powerful! Most of my customers are Joomla rookies, but with JCE even they have the ability to crop or resize images.
The options for individual adjustments f.e. reaction to return-key, custom-colors, file-types for link-handling, etc etc. are great. It tooks me a while to explore all user-options, but meanwhile I know where to put a hand on ;-)