We are very surprised that even when the KE100 is switched off (for example a room is temporarily not used, because one of the kids is on vacation), it switches on automatically as soon a switchpoint in its daily program is met. (Our kid is still on vacation)

In our eyes, switching off, is what it means: switching off (with frost protection). As soon as the kid comes back, we would w-switch the valve on.

With current functionality, you also need to remove the smart control. This is not user friendly and makes no sense.

Why not include the option permanently, when switching off. Would solve a lot of things. 

For the rest, we are very happy with the KE100 functionality.