In order to properly spin articles, you will need someone with an extensive working knowledge of the English language. If you hire someone who is exclusively going to spin with software such as The Best Spinner, then you'll find that your sentences will lose their impact and meaning.
I am able to use spinning software very effectively but I do not rely on it, and often will re-write entire paragraphs from scratch.
If you would like to send me a dummy text, I will be more than happy to provide you a sample of my work.