I had just secured my sites with the OSE security suite and that caused some minor cosmetic problems with this extension, but my emails were answered very quickly (even on the weekend) and Cameron really went the extra mile trying to make sure I was working correctly and explained the basics in his support emails while solving every issue.
You can pay much more for FB integration, but I really doubt you can better support at any price.
This extension gets my highest recommendation.
This security suite makes it very easy to secure all of your sites if they are subdirectories of a common root. This is the most common setup for commercial hosts.
It will require a little reading of the very well written documentation and maybe a couple of questions to support which will be answered quickly and in detail, but once you've done it you will have mastered it.
I can't recommend the OSE Security Suite highly enough. It will be a part of my tool box from now on. Don't be caught off guard again. Protect yourself and your clients. Buy OSE today !