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.
By now, most people in the SEO industry are more than familiar with the various animal named updates that have made it nearly impossible to rank without high-quality content. One of the most famous ones is Google Panda, which directly targets on-site content quality and severely penalizes sites that have spelling and stylistic errors or were not edited well.
I've ranked websites in the past with spun content, and now they are still on #1 position of google. First year (2014) google found me because my spun was really bad, many paragraphs were just copied and my position drop from #2 to around #20 after a panda update. Later I cleaned all my text with better spun (I didn't buy any article!), my ranking went up again, and with more backlinks I reached #1 and it is still there