Doesn't do the one job they're supposed to do. The fan is too weak to remove fumes unless the iron is within an inch of the machine, which is not possible on many repairs. But even when the device is in close proximity, it doesn't even filter the fumes enough to notice the difference in the room. After soldering in just a few minutes, the room is filled with the smell of flux. The power button is also poorly placed and you have to adjust the angle of the device to turn it on and off. I am very disappointed in this product and would not recommend it to anyone.