You cannot go wrong for the price of this unit. The manual is basically not even good for toilet paper. Watch the hundreds of videos on Youtube for instructions and tips on operation. Once you figure out the controls, this heater is awesome. I've used it for about 6 hours now, and barely a gallon of number 2 oil has been used. Plenty of warm dry air comes out it. The fuel pump is noisy, but it works well. The exhaust is loud, but if that isn't important to you go ahead and buy it. The possibilities are endless.