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The most stylish among all FMs.
Pro Has dual pane functionality
This functionality was removed in Nautilus and Dolphin at least in Ubuntu-Gnome, but Nemo kept this option, making the obvious functionality of cut, copy and paste much easier.
Pro Easily open as root
Option to open folder as root from within the right click menu.
Pro Supports bookmarking
You can bookmark folders that you open often, this way you can easily access them from anywhere while using Nemo.
Nemo can be extended to have additional features through third party plugins.
Pro Easily open file location in terminal
Option to open a folder in terminal, which can help executing commands such as bash.
Pro Queues file operations
Pro Good networking options
Supports ftp, ssh and samba connections.
Con Changing the background color or font type for customization is not practical
You have to do it with finding and editing the relevant CSS files. No buttons, menus or sliders for such customization.