One of the most used buttons on a central heating controller is the advance button. This turns on/ off the central heating until the next programmed cycle. One touch and hey presto the system is on (or off if required). This unit does not have this feature. Instead you are supposed to stand there pressing away on the temperature increase button until the standby temperature is increased to the desired temperature. Then the system is turned on. So an increase from 8 degrees to 19 degrees means 11 stabs at a button. Not ideal. Note to the manufacturers: the installation instructions state: 'unplug the ribbon connector which is plugged in to the front half of the thermostat'. There is no such thing! This caused a bit of head scratching. If there used to be one on an older model, why can't you be bothered to update your manuals?