Weather compensation is very worthwhile!
It enables the flow temperature to be the lowest that will provide the required heat and thus enables the boiler to be in condensing mode for more of the time.
I do have to say that I often have concerns relating to the non measurement of the inside temperature.
On simple boilers I actually fit an inside and an outside sensor and let the boiler respond to both according to a proportion that I set.
But the drawback is that if you go away for the weekend you have to go the your garage to fiddle with the time settings.
A simple £20 dial thermostat would enable you to just flick it down when you go out or go away.
Sometimes the simplest solutions are the best.
The great advantage of a programmable roomstat is that you can set a Maximum temperature, thus preventing the wife from Cranking It Up to sauna levels in your absenceIn most families there is only one person who understands how to program a digital time related controller.
I also find them annoyingly tedious and as I discovered recently they are very easy for tenants to lock up because they dont understand the instructions.
I would be interested to see the ones you prefer, can you post a link?
Bear in mind they can't turn the boiler on, or off, like Hometronic does. Which is rather key to having a programmable radiator.
PS: Hometronic was a Honeywell Germany launched product.