There are lots of reviews about the product, and many people here are writers that experienced a wonderful time doing their job with the aid of the tool. Most of these people usually say that you dont need to rely on the tool completely to get the job done because that will fail at most times. What you need to do according to the reviewers is that you should learn how to edit the article a bit so that it wont look completely spun since there are some clients that hate this tool.
Before WordAi even starts spinning, it reads the entire article to understand both "generally" what the article is about and the "specifics" as to what exactly happens in the article. This allows WordAi to create complicated paragraph and document level spins based on its deep understanding of the article. Because no other machine has this level of deep understanding, it makes your content look human written. It is even able to correctly write high quality titles by identifying what the article is talking about.
It is also very helpful for people who struggle with the English language in general and writing in particular. A free article spinner or paraphrase tool makes it easier for them to get new content with minimal effort. The quality of content created with article rewriter is close to human written content if not equally good. To ensure the quality, you can edit content to fix any errors.