Our central heating recently broke down and we had to have a new boiler. Before this was installed we used a couple of oil fired radiators as a temporay measure.
They work very well and give off a good heat.
One thing to watch out for is the thermostat, which makes a loud click when it goes on or off. This could be seriously irritating in a listening room. Some of the more expensive models have electronic thermostats, which should be virtually silent.