One plumber ripped apart my floor, than advised that job could not be completed, another suggested I close up the floor and leave it alone. Only then did I find Cascade and Paul. They came in, cleared the stoppage right away. They returned the next day, removed P trap, installed backflow preventer, refilled the hole and cement and were on their way! In short, they came, they inspected, they corrected, they completed, they left! I hope I don't need more plumbing work, but if I do, Cascade gets the call. Thanks Paul!