I bought the software yesterday, haven't done a lot of testing with it, seems very straightforward you copy the text into the tool, the output looks identical to the naked eye but CopyScape and the TheBestSpinner duplicate checker, which is much more precise than Copyscape can't detect it.
What I would do if some of the users here or even seo20 would help is to test (if you haven't done so already) how, if and what it looks like when Google indexes your site with the duplicate text. I specifically mean rankings, can you really rank with the copied text because, yes the content definitely is unique but that won't do you much good if the only thing Google sees is gibberish. SEO20 did you do any tests regarding that ?
Don't get me wrong, even if that doesn't work this is an awesome tool, but if it DOES work then this is an incredible tool.