By "radiant heat" do you mean the coils in the ceiling? If so, that's what my house originally had, with baseboard heat in the bathrooms. The biggest advantage was we had a thermostat in every room so we could really control our use of electricity.
Disadvantages to radiant ceiling heat were: my head was always warm but my feet were cold since heat rises

, replacing bad coils is a major tear-out of your ceiling, and some of our neighbors had problems with cracking in their ceiling over the years (we didn't have that although the house is over 30 years old now.)
The only disdvantage I found with the bathroom baseboard heaters was that it was hard to warm up the entire room evenly. It was nice and warm next to those baseboard heaters, though.
About 3 years ago we replaced our radiant ceiling heat with a forced air unit in the garage that is piped through the central air conditioning ducts so we aren't using the radiant or baseboards now.