Excellent!!!!!!! I use this in an unheated office inside an automotive shop located in a huge - cold - metal building and it heats the room up very quickly! I have several others that I put in other offices but this one is the best and heats a 10 x 12 room super fast. Only complaint is it can get too hot too fast in the room because it does not have a thermostat and the control is a is a turn dial. Performance Puts out the same heat as larger units with a strong fan to disperse the heat. Ease of Use Plug it in and turn the knob. Durability We have used this is an industrial setting with dust and dirt and it still keeps going. Design Small and easily movable, great for quickly heating up my toes by the desk! It is very light and has an easily graspable handle so those with grip issues or arthritis will not struggle with it. It runs extremely quiet which is a plus. Safety I like this one because the base and entire unit NEVER gets hot to the touch. I don't worry that it is going to overheat and cause a fire.