Under floor heating creates a gentle radiative heat instead of convection heat that pushes heat away from its emitter. This gives you a much better feeling of comfort and better air quality.
If you have a well-insulated home you can design your flow temperature to run as low as 35oC making underfloor heating incredibly efficient with high CoP (Coefficient of Performance) results that can be designed into a heat pump system.
You are heating a large (floor) area, which is much bigger than a radiator, this makes the whole system up to 25% more efficient. Which is great for the environment and also saves you money on your heating bills.