Craig Mazin of [Artful Writer](http://artfulwriter.com) has had enough headaches (and heartaches) with Final Draft. He’s switched over to Movie Magic Screenwriter. You can read about his reasons why [here](http://artfulwriter.com/archives/2005/05/dear_final_draf.html), followed by a lot of opinions from fellow screenwriters.
Me, I’m still using Final Draft, though as often as I [complain about it](http://johnaugust.com/archives/2004/survey-up-for-screenwriting-software), I should probably give MMS another look.