A really good product that does what it is intended to do. It saves 'breaking yourback' leaning backwards as you need to do without the devie and is a great deal safer. The device is sturdy and is fitted/detached very quickly once you get familar with it. One consideration, the width of the device that touches the wall is some three feet wide so you do need this width of wall to which to lean the ladder and the device to touch the wall; in may case the windows go directly to the soffit so I do not have wall space to which to lean the ladder in places - I have devised a workaround.
Well worth the expense for the occassion use I give it.