This heater has worked for me very well for three winters. The heater is about 15 inches high and about 8 inches wide. I usually place it between the two main comfy chairs in my living room and that nicely heats the area for anyone in those chairs. The heater is low, so it does a particularly good job of heating up your toes, which is good for me. When turned on at full strength (800 watts), two bars light up and provide warmth. At this strength, it will get too hot if you are too close, but its very warm if you are 18 inches or more away from the heater. At half strength (400 watts), this heater provides more than enough warmth if it is close to you (about 12 inches). I picked this heater in part because it provides a lot of usable heat for not much electricity. I mostly have it on at 400 watts, so it is only using up 4 times the electricity a 100 watt bulb uses. If I have it on, even on cold days my central heat almost never turns on. If you are thinking of this heater, you should probably decide if there is a good place to locate it so that it will heat your room. I do not think it would do a good job of heating a bedroom because a lot of the heat is low to the ground. The cord is fairly long, about 6 feet. My two cats LOVE it and are almost always cuddled up in front of it. Performance Works very well if you are seated fairly close to this heater. Ease of Use To use this heater, you turn a large nob on the top right corner of the heater. There are 3 options on the knob: (1) off, (2) 400 w or (3) 800 w. The problem is that the writing is a little small on the nob and you have to bend down to see, so it does make it a little annoying to pick the right setting. It may be a little annoying for the elderly to deal with. Durability This heater has worked for me for 3 winters. Safety I don't leave this heater on if I'm out of the house. You can't get drapes or blankets too close to this or there could be a problem--I scorched a blanket once. The heater has tipped over and it did turn off.