Having used Movie Magic Screenwriter in several versions, it wasn't until the NaviDoc that I truly fell in love with the program. Being able to have a quick reference to all my locations and characters makes writing a script that much easier.
I wish that Write Brothers, the publishers of the software, would create a mobile version that would interface with the Desktop version. That said, I have little complaints. I've used at least five different screenwriting programs and, aside from Final Draft, have yet to find one as feature rich and easy to use as this Movie Magic Screenwriter.
This is a great program. Honestly, there are only two screenwriting programs that are accepted in the film industry. The de facto standard is Final Draft. Movie Magic Screenwriter holds the number two spot. I think that rationale is a bit unfair, as I prefer it in many respects. Ultimately, I think they are on equal terms and the choice between them is a matter of taste. Some like Final Draft and like it's prestige. Others prefer Movie Magic Screenwriter. I am of the latter variety.
I use it to writer screenplays, teleplays, and scripts for promotional and advertising videos for my video production company. To put it simply, the benefits of automatic pagination, scene numbering, plenty of export options and being able to quickly find and replace items within screenplays has made my workflow much faster and easier.