This flash dryer definitely works. I gave it 4 stars because the 3 out of 4 of the holes for the screws on the underside of the dryer worked, but one was off center which made it impossible for me to screw the screw in all the way. The shaft of the unit also arrived with some rust on it despite it being powder coated. I honestly thought this thing was super easy to assemble and can’t understand why some people seem to struggle with it so much. You clearly need an outlet that will support 20amps in order to power this thing, you can’t simply plug it into any of the outlets in your house. Check your circuit breaker and see which rooms have 20amp outlets, they will most likely be in your garage if you have one. You also need to make sure the 230V circuit breaker is in the on position, it needs to be on for the unit to work, otherwise it will trip the breaker. This unit is manufactured in China and the instructions are not really instructions, since it arrived rusty and the screw didn’t fit I knocked off one star, however it heats up enough to get the job done.