I downloaded a demo of Movie Magic Screenwriter 6 to just give it a try. From what I could make out you get the full programme to use free for 14 days. I had the manual open and it seemed relatively straight forward to use but I just couldn't understand how to use the templates so I found that a bit frustrating.
I was also surprised at how fast it downloaded. It was less that a minute and I have quite a slow broadband connection.
All in all I don't think I will invest in any expensive software like this or FD until a producer actually shows some interest and it warrants me paying out the cash.