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.
I love EVERYTHING!!!! Spin Rewriter is extremely easy to use, and the quality is the best available on the market... PERIOD!!! Even if you are new to marketing, you know that content is a major cornerstone. We use to spend thousands of dollars having content developed. Using Spin Rewriter has cut our costs by 90%. The best part is we did not have to sacrifice quality in order to increase production.