In testing we found that the editor loads much faster in real-time comparison, however, running the editor with our JCK plugins installed will increase the load of the editor. Also running the editor with two or more spell checking tool enable is a performance drain!
The form styles editting CSS option is very cool to play with. I had to contact support to suit the form with the look and feel that I've exactly dreamed and got replies very shortly. It would be a nice modification if a module or a plugin version is developed to be used within any article. IMHO, there is, already so much that a donation is worthy for those intelligent work and support.