Zorin is an Ubuntu-based OS.
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Pro Windows desktop style
The desktop UI was made to resemble Windows 7, but alternative settings are available.
Pro Good Selection of pre-installed software
New users may be unaware of what software is available for Linux, but Zorin includes a good selection for everyday tasks out of the box.
Zorin is compatible with Ubuntu's sizable repositories of Free Software.
Pro Partial Windows compatibility
Zorin includes WINE and PlayOnLinux to run many Windows applications and games.
Pro Bundles tools for changing the look and feel of the distribution
Zorin includes look changer and theme changer.
Pro Installer can set up dual boot
Pro Accessibility features
Pro Low resources consumption
Con Limited desktop styles in Free Version
All free editions only offer Windows XP, 2000, and 7 and Gnome 2. You have to pay $9-10 in order to get Unity (Ubuntu) and Mac OS X themes.