I bought this to use in my Landie, which is usually frozen on the inside (even on a summers day!!) and I thought that this would assist with the defrosting. It is OK for the price I paid.. but it could be slightly more powerful. The heat is enough to assist with the de-misting of the windscreen but doesn't really have the power to give any heat within the vehicle. I read the reviews, so knew what to expect and have not been disappointed. Land Rover Defenders are notorious for their lack of heating and it would take a powerful fan heater to make any real difference. So overall, it's OK.. but could be better.