I have two so i can activate and kill on demand; you choose what you want...You can always open terminal and type killall switcher to kill too if you don't intend to use the kill icon much...

Of course that is if you intend to use Volume Buttons; you can make icons with /opt/cyclotron/bin/cycle which you can link as an application to launch in MyMoves too which won't require killing...

As thp says on his page, use your imagination; i tried the volume buttons and MyMoves and prefer to stick to volume buttons...Of course you can use quicklaunch bar for it or think of something else too