I quite like Unity, although I didn't expect that I would.
The launcher, however, has me a little concerned at present.
It functions perfectly well, but the Files & Folders object has as a feature a 'recent' section which displays recently opened files. This is much the same as a menu object available in Gnome, except with the latter you could clear recent files for security or privacy purposes - you cannot do this in Unit.
I have found that if you drag a file from the 'recent' section in the Unity Files & Folders object to Trash it doesn't just delete the shortcut - it deletes the target as well.
It is not at all clear if and how you can configure the File & Folders and the Applications objects to display what you want rather than the default, and the inability to quickly and safely clear recently opened items is something I think is in need of a fix.