Hi davidoco, unfortunately I wasn't able to use the Heatmiser stat which also controls the DHW because I am using floor sensors which limit the temperature of UFH delivered to floor. This is (i) to avoid overheating floor and damaging flooring, timber, etc and (ii) to avoid stat calling for heat when the air sensor is cooled by a draught (eg. open door/window) while floor temp is still good.
So if you use floor limit sensors with Heatmiser stats you cannot use the version with integrated DHW control. For DHW control a separate time clock was needed.
Re. the touchpad... It is optional but really worth while having. The ability to see the status (temp, etc) for every room from one location is great. Also ability to remotely keylock the stats, see history for each stat, set holiday mode, etc, etc.