Having used this WordPress plugin for a month I am very impressed in its ability to protect against threats to our website and give information about "real humans" who have come to visit us. As well as all the spider web search crawlers.
My sisters run an online database website which has been hit by a Denial of Service attack. The website has been offline all day. This has brought home to me the necessity of protecting your website and protecting your content. I will blog on this latter theme another time.