I love this.  It was easy to set up and install the App.  It goes under the bed and furniture.  It may go over an area a second time, but that is good, because when it is done, nothing is left.  All the pet hair, the cat kibble,  and more....all gone.  It goes over my throw rugs, floor radiator vents, and even deals with the dining room chairs.  I am very happy.