Conclusion, if it boils down to speed, money and most readable spun content SpinnerChief Ultimate is what you want. If you’ve just got to have a web based solutions then WordAi is what you want. Remember we are using the cream of the crop here Word Ai Turing Edition and Spinner Chief III Ultimate. I believe the majority of users will opt for SpinnerChief Ultimate over WordAi Turning due to WordAi’s cost.
It has helped me to get high quality content fast without having to outsource the spins. I used to spend hundreds a month just on getting article spins for all my client sites and SEO campaigns. It's very effective on getting amazing spun variations of highly relevant and high quality content quickly. You can also go back and use them again in the future since it archives them. I love that. (TIP) Spin 10 completely different titles with your articles for ultimate diversity!
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