Hello.
The engineer fitted the Hive system and it appears to be straight forward and user-friendly so I'd guess it will cater for all of our needs.
I could have had one of the alternatives you've listed but from what I'd gathered Hive seems to be the most popular with installers so I opted for that but he was willing to install one of the alternatives if I chose to do so but generally they all do much the same thing as far as I could see.
So far the Hive kit/app has been very easy to set up and schedule as a user, far easier than messing about with the old wall timer and although the Hive system is digital it does seem pretty simple and bomb-proof though time will tell on that. Obviously if the internet is down so too are wireless connections but it has the emergency manual override so all is good.
The boiler is covered by a 10 year warranty but I suspect the Hive kit will be typically one year.
During colder holiday periods we've always set the original analogue system to 10-12 deg and lower temps depending upon the time of year. Just enough to keep the chill off the home and prevent any risk of freezing during winter. As we have the traditional insulated hot water cylinder/airing cupboard, the boiler was set to come on for one hour mornings and evenings and we've always had plenty of hot water. During periods when we were away, there was no use of hot water so with the cylinder insulation etc, heat loss from the cylinder was minimal so demand on the boiler was minimal to heat the water.
My OH preferred to retain the cylinder/airing cupboard so that's the new boiler was basically a more efficient like for like replacement.
With the Hive system I have full remote control. What will be nice after a day out in winter, is that instead of coming home to a cold house because the timer hadn't switched in, I can now adjust it instantly and remotely from wherever I am so no more coming home to a cold house in winter. That to me is progress.