At first I didn't like the auto resizing properties, and my GF hates it. But I often have a window I would like to enlarge, but I don't want it to take the whole screen. By grabbing the very top or top corner (when the curser is a double ended arrow), you can pull it to the top, and the window will automatically fill the vertical space without affecting the horizontal size. This includes a window that has been moved down so that the bottom below the screen- the bottom will become flush with the bottom of the screen when the top it brought to the top. Now, since the feature is disabled on my GF's machine, I find it flustering when I try to manipulate her windows.