When I got my Seiki I basically tried all of the different Mac Window managers, most of them were immediately out of the running as they couldn't support a large enough grid to make sense (2x2 was the standard). With Divvy I could set up a 6x6 grid which is perfect as you can easily set global shortcuts to treat it as either a 3x3 grid or a 2x3 grid with your keyboard shortcuts on the Command and Numpad (see image) http://imgur.com/3E474eP This is awesome as you don't have to really 'remember' a bunch of shortcuts as the keyboard grids look just like what your screen grids are.