I had been using CK Editor since before it was called CK editor. I recently needed to redo a huge website and thought I'd try a new, highly rated editor, so I installed another of the popular Joomla editors. I tried that for a few days, and even paid for an extension to make it do what I always got CK Editor to do for free. Well, I came away disappointed, and am happily back to using CK Editor. Yes, it's a bit more trouble to install CK Finder (once), but once done, my time spent editing is actually MUCH faster than with the other editors. Some things I love about CK Editor:
I can swith between code view and design view while the editor is still fully maximized... a big time saver.
I can drag multiple images from my desktop right in to the ck finder window, into the folder I choose.
I found it a lot easier to make the editor css style view match my front end website view and css style.
It is a breeze to make custom templates.
So for anyone who has a negative experience with this great editor, there must be something they have done incorrectly. Plus, it's a totally free extension for Joomla.