There as several reasons why i ordered Climate control, most of the year you can set the temperature to what you like best and forget about any more adjustments, there is no need to turn the A/C on and Off or turn the heater up or down. Also the is a dehumidifier (sorry about the spelling) with the climate control which stops the windows steaming up.
Air conditioning whether manual or auto (climate control) acts as a dehumidifier. Climate control is simply, as said above, set it and forget it - provided you leave it in 'Auto' - which controls both temperature and air distribution. Demisting the front windscreen takes it out of 'Auto' and thows everything to the screen - you then have to reselect 'Auto'. Similarly if you alter the fan speed or air direction manually it takes it out of 'Auto'