As far as I'm aware there are no distributions that include this software as it is not very well known. This shouldn't mess anything up on your OS as it's a small application, but small netinstall of Debian or whatnot on a virtual machine works just fine. However it doesn't usually show up in display manager's greet menu so you're probably going to have to open a blank TTY and type "startx /usr/bin/notion". This window manager is available in the standard package repositories of arch, ubuntu, debian, etc so there should be no hassle to install it. To answer your last question, it is definitely not what I would call user-friendly. :p this is seems to be primarily aimed towards computer enthusiasts who like to tinker and micromanage their work space. I can share you my configuration files if you can't stand the default. I know I couldn't. If you're still interested that is.