The primary door into our house opens directly into the kitchen...no porch, no mudroom, not even a stoop.  My husband is a farmer, so you can imagine what he would track into our house if not for the Scrusher!  We've had at least three of these over the years and couldn't be without one.  We're fortunate to have brick and railroad tie walks, so the frame can be attached to the railroad tie right outside the door.  Highly recommended!