Been using gm and was not going to upgrade when the official came out because it seemed they removed the one feature I use the most. Assigning applications to spaces is what I use all the time. I open mail it's in space 2. ITunes space 3. Vm space 4. Mission control didn't seem to do this. Deal breaker for me. Not anymore. I found put how to do it. Ready to upgrade when the announcement hits. For anyone that didn't find it yet. Move the program to the desktop you want it on the right click the icon on the dock and under options you'll see this desktop or all desktops. Click this desktop and your good to go.