WSDL Styles

For long i have been confused over the various WSDL styles is Web services. I knew that the styles were RPC/literal, RPC/encoded, Document/encoded and Document/literal, but how these actually impacted the service or how the SOAP message changed based on the message binding style was a big mystery it me. But recently i stumbled upon the following material in the developerWorks forum. It did clear a lot of my doubts. Do go through this article Which style of WSDL should I use