It did not let me choose between Desktops ( KDE or Gnome ). It always started in Gnome instead of KDE. I was able to change the correct file, but it would seem to me to be an easy thing to let oe chose the Desktop they like.
You can choose the desktop you would like to load from the gdm login screen. Also you can run the 'switchdesk' utility from within whatever desktop you are currently running to choose which desktop will be your permanent choice.