We have used this heater in our small, un insulated "sun room" (8'x7') that turns into an ice box here in San Francisco foggy weather, and since we use this room as our bedroom, we needed a safe way to keep the bedroom comfortable at night. It did start to develop a crack after about a year, but is still putting out a nice amount of heat. We use it nearly every night and it doesn't get OVER HEATED, but keeps the temp of the room just right. IT's HOT to the touch, and we tried to hang wet items on it to dry and this left an ugly brown water stain. But even with it's blemishes, it continues going strong. For the first few weeks of using it, AND after we haven't used it for a few days, there is a VERY strong ODOR that really hurt my throat and I had to air the room out. I recommend turning it on 20-30 min before bedtime to warm up the space, and if you are sensitive or allergic in any way to chemical or plastic smells, this heater is NOT for you!