It is Linux/Unix, so with regards to configuration, if you can imagine it and you are a creative and skilled administrator, you can probably make it happen. Plus it is rock solid stable -- you get pretty much the same software packages as Red Hat Enterprise Linux, just a little behind on the timeliness of releases.
I use it at home and at work. I use it at home because I have five kids who click on anything and everything on the internet, and there's just not as much malware out there to affect a Linux operating system. Plus, it's just not as bloated as Windows, so performance is more efficient with the limited computing resources on my home computers.
Although I wouldn't run my mission-critical applications on it (since it is free), I feel safe running it in an enterprise environment for solutions such as firewalls, DNS, application front-end, etc. And you can purchase third-party support for it. It also has a great community of support on the internet, and software repositories are updated frequently and are reliable.
Finally, it runs on x86, so it works great in a virtualized environment (VMWare in our case) and can easily be deployed from a golden image over and over. Review collected by and hosted on G2.com.