SpinnerChief 5 has super-advanced functions such as auto-grammar fix, for example it will correct "a apple" to "an apple," plus it can spin "I want to eat the apple, orange and banana" to "I want to eat the banana, orange and apple." We can't list all functions here, there are too many to list! - But one thing is sure, SpinnerChief 5 will give you the best rewritten article - no other spinner can do what SpinnerChief 5 does!
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.
There are some 'free' article spinners out there that require you to enter your text with properly formatted 'spintax' in order to create the end result. But how you need a totally separate tool to create this machine formatted text, so how is this really useful to you? Spinbot does all thinking for you, from taking in the context of every phrase to creating additional textual content that is as readable and meaningful as the text you originally entered.