This is a nice little heater for those cold spaces in your house. It's not going to heat up a large room. However, if you have a small bedroom, or even just want a little more heat while you veg out in front of the TV, this will get the job done. It has a nice shut off feature, so that if it gets tipped over, the power cuts out and so it won't light your house on fire. Performance I don't know much about how these things are rated, but I can tell you that it's really just enough heat for one person (or I guess two if they are sitting close together). It's ideal for a home office (under a desk) or maybe in a cold bathroom. It's not going to heat up a big space and the heat mostly stays near the heater itself. Ease of Use Pretty simple...plug it in, then turn it on to low or high or fan only. Not really much to think about! I use it under my desk in my office. The switches are very easy to understand. There is an on/off switch, and the other switch has low, high, and fan-only. Not very fancy, but it works well. Durability I only use this occasionally on really cold days, but I've had the heater for a few years and had no problems with it. Design It is great for a small heater. Like I said, it doesn't spread heat out very well, but it is only for a small space. It has a nice safety switch that shuts it off if the heater is tipped over. Safety There is a safety switch that shuts the heater off if it is tipped over, which is a nice benefit because it will help prevent a fire. The unit itself doesn't get hot to the touch either, so between the safety switch and the lack of hot surfaces, I think there is very minimal fire risk.