Of all the electric heaters I have tried, this is my favorite. I first tried a couple, then bought several more. The Econo-heater uses only 400 watts, so does not trip breakers on a normal circuit. Yet it seems to heat as well as the bulky radiator-type electric heaters, and the noisy ceramic fan heaters, which will use up to 1500+ watts.
It is low profile, fitting close to the wall. It is quick and easy to install, and just plugs into a normal outlet. Plus it can be painted to match a room's decor.
It heats both by radiation and convection, and is completely quiet when operating. It is mounted low on a wall and slightly away from the wall, so as it warms up it pulls cool air up from the floor, heats it, and by natural convection the warm air begins to circulate into the room. Also, it is very warm to the touch, so you can stand next to it and really warm up. You won't want to touch it, but if you do it is not so hot it burns skin. If you mount it on a mass wall (brick, stone, adobe, even dry-wall) it will tend to heat the wall, too, over time. This stored heat in a mass material warms objects (like people) also by radiation, in addition to heating the air.
I found out that this heater - the Econo-Heater - is made in South Africa, and has had a long R&D history there. It's produced in an integrated factory, and this made me feel even better about the product. Recently I read a couple reviews about a look-alike heater called the "Eco-heater" which sounds like an inferior imitation of this product that people were unhappy with. So be sure you order the original "econo-heater".
Two caveats worth mentioning: This heater will not make up for a building with poor insulation (like mine). It has been very useful in bathrooms - but don't hang your towels on it. Also, it has no thermostat, so it must be turned on and off manually. Still, I have found it to be the most cost-effective and aesthetic solution to small room heating I have discovered.