Very poor. Had to be serviced within a few months of ownership with limited use. Smoke was coming out. Had to go through the hassle of taking it to the shop to get repaired. When I tried to use it again, it lasted half a room and stopped sucking up the water. Took it back a second time for repair and it never worked right after that. Total piece of junk. I got maybe three uses out of it before I had to get rid of it.