In the winter my office is extremely cold; it is on the third floor of the house and the furnace isn't powerful enough to force the heat up three floors. I started looking for a small space heater but was worried about it getting knocked over or potentially deadly fumes. When I saw this one and read the box it seemed like the safest one for my needs. I only ran it when I was in my office and didn't see a spike in my electric bill while I was using it. There was a built-in heater in the bathroom that stopped working a couple years ago; getting out of the shower to a cold bathroom is extremely unpleasant and I needed something to warm up the room while I waited for my silicone sleeve for my prosthetic leg to dry before I could put it back on. This worked perfectly and kept the room warm; I had it on the vanity when I was using it in the bathroom and only ran it for about a half hour when I would take a shower. This is one of the safest portable space heaters I have seen because there is an automatic shut off function if it gets knocked over. The grate on the front of it prevents burns but I would never leave this running in a child's room because you never know when they are going to try to put something in between the slats. This isn't loud when it is running but it does generate a decent amount of heat. I am kicking myself for not getting a couple more of these when they were on clearance at the end of winter because they are nice to have around to take the chill out of rooms that don't get a lot of heat from the furnace.