Google is getting VERY good at catching spun content so you'd better be talented at manual spins. If they DO catch you, of course they'll spank you... and hard. So anything you use spun content on is inherently AT RISK. Worse yet... Google gets better at finding spun/poor content every year. So in the longrun you're screwed. I'd weight your other options and see if you couldn't find a cheaper source for manually hand written content.
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!
Having struggled flat broke for 4 years in IM before I made it, I know better than anyone what it's like to never see success. I know what it's like to keep failing over and over when it seems like everyone else is succeeding online. The good thing is that I never gave up, so here I am, who know how to make money online wanting to help you achieve what I did... MUCH faster than I did. Hey it's Leo. I'm a sort of an optimist. Survived internet marketing, wonderful wife, have 2 kids. My wife would say I'm a night... I think morning. Enjoy travel, spend times with friends. Go out to parks, fishing and watching football and trees (treekeeper) are the things that I love to do.