Just released a few hours ago. My laptop is already running it. All I need to do is to simply upgrade from the previous version through the Update Manager. It's a breeze.
Ubuntu Desktop is my preferred desktop OS. It is pleasing, easy to use and has almost all that you need. If you are pretty savvy, as in you know how to install stuff and all, then switching to Linux is not that hard. It's a matter of getting use to something totally different.