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.
Aaron and I have been doing business together since the summer of 2012 and coincidence or not, the revenue of my business has quadrupled in this time. We recommend Spin Rewriter to all our members in our newsletter and it's been by FAR the best performing affiliate product we recommend. I think we did over $4.60 EPC with one of our earlier mailings. We've never heard of anyone requesting a refund so all in all it's really a fantastic product which sells itself.
The method is very simple, if you have the know-how of computers and internet then using this tool should be no trouble for you. All you have to do is copy and paste your text or article in the text box, and then click on the button saying “Re-write Article”. If you would like to play a little with this article rewriter tool before you go for it then you can use one of the given samples and watch it do its thing.