The security features are excellent. This is a great mix of ease-of-use and strength-of-security. I am a newbie to web site construction (am building my own) so I don't need the hassle of css, js, etc. I can manage a little HTML, but not much else. This plugin makes it easy for me to implement strong security and that, my friends, is very very good. :-)
I am using the Vantage theme from SiteOrigin with a lot of plugins and everything is working great together.