Delonghi ComforTemp Oil-Filled Radiator —
Bought this heater in February of last year and found that it didn't heat very well, and in addition the household electric bill TRIPLED for February and half of March. Of course, in March we got the February electric bill and promptly returned this heater.
We now use a small, conventional space heater that has the heating element and a fan inside. It feels so much warmer and the electricity usage is barely noticeable.