Owner is a scammer who has been banned from major SEO forums for fraudulent and deceptive practices. You might be willing to look past the fact that the owner of this product creates fake accounts to post fake reviews and lies about the product if the product itself was actually good, but unfortunately Spinner Chief itself is filled with half baked buggy features (which are advertised as working completely) and can't go more than 10 minutes without crashing. All in all it is a complete waste of money and time.
After rewriting and keeping the dynamics of the writing same, our tool passes it through a plagiarism checker. This ensures that the legal standard of plagiarism is maintained after rewriting the article. After all this process, a final rewritten form is presented to you. All this process may require some time depending upon the nature and length of the article to be rewritten.
So you are still doing it? I have stopped using spin content after panda update way couple of years ago. As content become king and the user expereince the key to earn website authority, I started focusing on writing more meaningful and engaging content. I never cam across any spinner that time which makes total sense after spinning. The spin content either looked very bad or it needed manual review. I forgot the name of the spinner tool as well. Looking forward for replied from more experts here as it could be an eye opener for me if spinning still works.