The problem with underfloor heating is maximum temperature is 27°C, this means very slow reaction times, so it has to be on 24/7, for space saving kick space heaters are a better option, but they are also not without problems.
With gas using water to distribute the heat, the faster the room can heat up in the main the better, as you can turn off heating until required, or at least turn down heating, I use a 16°C Eco mode and 20°C comfort mode as it does not take long to raise a room 4°C. The old house had a gas fire and a Myson fan assisted radiator and a standard radiator in the main room, so from walking in the door all heating off, to being at 20°C took around 10 to 15 minutes, so there was simply no need for geofencing or internet control in any way.
This house there is a wood burning fire, but it takes so long to light it is emergency only. I have two radiators in the main room, so from turning on to being at 20°C can take an hour, so I do have geofencing using internet. It is not at 20°C when I get home but not far off it.
With storage radiators you have to plan the day before, and with under floor heating not much better, switch on to warm floor around an hour, warm floor to warm room another two hours, so from off to usable temperature 3 hours, four hours before it is at 20°C.
Hot air central heating either direct or using fan assisted radiators is fast, however most rooms are not at a single temperature, around the windows it is cooler and around the radiators it is warmer, and being cooler at windows means we loose less heat, because the fan assisted radiator blows the air around the room there are no cool spots, so it costs slightly more to heat the room, but it heats up fast, so a trade off, it also cools down fast. With pre-modulating boilers you would feel a little chilly before it kicked in again, with modulating boilers that is not a problem, the better system like the ivector have multi speed fans so as you want more heat the fan runs faster, this also makes it less noisy once the room has reached temperature, although don't think the kick space type are multi speed, mainly used in kitchens.
One in a house works well, but the water flows be it on or off, the fan does the controlling so it allows warm water back to boiler, this can turn the boiler output down, does not seem to be a problem with one in the kitchen, but too many and looking at building control packages which start to work out expensive. There are two types, those with single matrix and those with twin, the twin matrix type can do cooling as well as heating. Well so can single matrix type, but not cool one side of building while heating up other side.
Clearly a lot more expensive than a simple radiator but so is underfloor heating, I think wet underfloor heating is ideal for an OAP home, as no hot radiators for them to get burnt on when they stumble and grab things to save them selves, but baby crawling on a hot floor clearly not ideal. And intermittently used rooms also not ideal, in fact about the only place it is good is a OAP home.