Read through the article reworks and i will admit they are the best automatically generated reworks i have seen, obviously not up to the standard of a manually written rework but still fluent and easy to read, with the very very occasional exception (Spotted a small sentence which didnt read in 1 of the 15 i read.)
I read through 15 of the articles, to give them a proper trial and they looked like they would pass a copyscape test, although i didnt personally try.
For the price even if only 10 pass a copyscape, it is well worth the money.
Hope this helps you make up your mind
Haynesey