The most impressive plugin I have seen so far.
I would be happy with just the free version but the premium version is so inexpensive why would I skimp on security at that price?
Within about two minutes of installing I ran a scan of my site and it found a critical item of code that had been altered in the wordpress core files by comparing my version with the unmodified version released by wordpress. That to me is impressive, apart from the fact I get a ton more security options to mess with and with all these new powers I can act out my megalomaniacal tendencies by banning whole countries or even just the odd annoying people that every site gets. I can keep out everyone except my target audience. I am going to love messing with all these ban options, and dont even get me started on the code scans I can do. Now I just hope they take paypal