It works very well. Fumes only when it is lighted first 5 - 10 minutes and also switched off - this is just common character of all paraffin heaters.
This has a very sophisticated burner system than usual other simpler paraffin heaters - once it is burning and wicks adjusted to optimum, it burns clean glowing expands by the reflector at the back. It throws a lot more heat than other paraffin heaters without the reflector. But no paraffin heaters are 100% clean, and should be only used in large open space such as shed and green house with good ventilation. I will also PM as well. cheers.