It has a lot of options for security, easy integration with our website, it's cheap! I do not have any complaints about this software so far (at least that we noticed). Very simple to use and install, and very effective in protecting against all known attacks as long as you're using the most recent versions. The only thing i dislike about Ioncube is how hard they make it to get support. We've been waiting over 3 months since last contact from them. There was also some delay when sending payments via PayPal. Make sure to check out their forums before purchasing to be sure there are no pending issues. They help protect your site by encoding/decoding php code.