What I am trying to say is that if I were you, I would play the demo to death to make sure that it did what I wanted it for before I purchased it.  The demo is literaly a "gift" from E-On for you to test the hell out of the program to make sure that it works for you.

By using the demo, you get the full version of xStream to test and make work with your workflow.  If it works for what you want - great - buy it.  If there are issues, see if you can get them solved/resolved to get your workflow to production stage.  Then, when you feel it is ready for production - only then - purchase it.

As far as I know, the only limitation of the demo version of xStream is the limited size of renders and a water mark.  Which should be fine for testing.

Does that clear up my comment?

BTW - I hope that others "pave the path for me".  Less pain I have to endure the better.  :D
(For the life of me I can't figure out how to put "smileys" into my post.  Must be a simple thing - otherwise I'd understand it.)