If you have not used a spinner before then I would suggest that you first use something that require more human imput like The Best Spinner or Spinner Chief in order to understand the basic principles. However if you must go fully auto then I would suggest you go for Wicked Article Creator. I have it and understand it is similar to wordAI but a one off fee of $47.
"It is my pleasure to give testimonial about this spinner tool. I think this is great and highly recommended tool to build a many unique articles for our internet marketing world. At the first time, I already see about another great spinner tools, but it is not free. And fortunately for me, I found spinnerchief. The free tools which have almost the same quality with another cost spinner tools. I already use spinnerchief to build many articles to attract traffics for my below minisite"
Having a continuous flow of fresh, human-readable text is the best way for your website or blog to gain search engine exposure. Content is King, as they say ... at least as important as basic search engine optimization. Thus, Spinbot can be a vital tool for anyone who wants to market their website or product online as quickly and efficiently as possible. With all the unique, quality textual content you could ever want, you will quickly gain legitimate web visibility, both in terms of human readership and search engine exposure.

"It is my pleasure to give testimonial about this spinner tool. I think this is great and highly recommended tool to build a many unique articles for our internet marketing world. At the first time, I already see about another great spinner tools, but it is not free. And fortunately for me, I found spinnerchief. The free tools which have almost the same quality with another cost spinner tools. I already use spinnerchief to build many articles to attract traffics for my below minisite" 
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