This is a great little heater. My workplace is freezing. I move this from my desk to my feet depending on what I need. It gets toasty. I just tip it on its side when I'm warm enough because it has a stop button underneath. This little button is a safety feature and makes sure that the heater turns off if the heater is not sitting right side up. It's stylish, does what it needs to do, and I think it was worth what I paid for it. It's pretty quiet, so it's not interrupting my calls. I don't know how energy efficient it is because I'm using it in a space where I don't pay for the energy, but it hasn't blown the surge protector. It seems sturdy, but it's not getting too much movement between my desk and the floor.