I bought a house with wallpaper in every room. I tried steamers and all the remover products out there and couldn't get it off. One room had an intricate cut out border of a picket fence and tulips. A friend recommended Piranha and I tried it. The directions said to wait 15 minutes after scoring and application. The paper started lifting off the wall in 5 minutes. No smell and neat as could be. I highly recommend it!!