Open Embedded Linux Entertainment Center (OpenELEC) is a small Linux based Just Enough Operating System (JeOS) built from scratch as a platform to turn your computer into a Kodi (previously XBMC) media center.
Ranked in these QuestionsQuestion Ranking
Pro Great support
It's very easy to find support for any problems you may run into with OpenELEC.
Pro Ease of use of XMBC that is easy to install
Very easy to setup through XBMC Live which is a very easy to setup distribution.
Con The online installation guide is very convoluted
The online guide on installing OpenELEC is very convoluted and practically makes something very simple look like it's difficult. For example, the installation bundle comes with a script that is used to prepare the SD card, but then according to the guide you have to manually copy it to the device. While it can just tell you to
wget the image and then write it to the target media in just a simple command.