I use it. I use a pretty standard stack - nginx, postgres, php and a few other things so I don't have the issues some of the other posters have mentioned here about needing to hunt down source and patches and everything is installed via the standard package manager pkg.

One thing I really like about it besides the things others have mentioned is that by default it sends emails every day/week/month regarding security and system usage statistics, so it tells me when a security vulnerability has been found for a package I have installed and that I should upgrade it.

I've found this makes me much more likely to keep things up to date.