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.
There are some 'free' article spinners out there that require you to enter your text with properly formatted 'spintax' in order to create the end result. But how you need a totally separate tool to create this machine formatted text, so how is this really useful to you? Spinbot does all thinking for you, from taking in the context of every phrase to creating additional textual content that is as readable and meaningful as the text you originally entered.