I cannot wait for Unity to die, and now it does. I was not very happy when they decided to make Unity mac-like by moving the menu to the top bar. It has to be the most idiotic decision around for anyone who has multiple monitors. Even with a single monitor, it is a pain in the ass to move the mouse all the way to the top left corner for the menu to appear, and then orienting myself with the items presented.
You could always use keyboard shortcuts to access the menu. Unity also let you search through the menu items with the Alt key - no manual navigation necessary. I thought that integrated menus are a great idea - even Apple does it. It saves vertical space and looks "at one" with the rest of the system.
Honestly 'even Apple does it' is a poor argument. If global menu would be a really good and generally accepted idea we'd see it implemented in GNOME and KDE (via extensions at least).