Linux Mint is a community-driven Linux distribution based on Debian and Ubuntu that strives to be a "modern, elegant and comfortable operating system which is both powerful and easy to use."[5] Linux Mint provides full out-of-the-box multimedia support.

Linux Mint 18.3 is a long term support release which will be supported until 2021. It comes with updated software and brings refinements and many new features to make your desktop even more comfortable to use.

More info: https://www.linuxmint.com/rel_sylvia_kde_whatsnew.php