"dragging windows to the sides of your desktop will auto-fill that side of the screen, saving time spent on re-sizing windows to fill unused space."
I've gotten so used to this feature from Windows and various Linux desktops, I think I would be pretty lost without it.
I love it so much in Windows, I'm sometimes annoyed when I forget on my Linux work machine and drag windows to the side only to have it flip to another desktop instead of fill the side of the screen.