This product is not as advertised. It does stick to the window but the enclosure is molded plastic that tilts the cat down into the window glass rather than providing a safe place in which to relax. It is long, but it is not wide enough for my 12 pound cat to climb into and be comfortable. It is so poorly designed as to be unusable. My cat refuses to go into it, or to stay in it if i place her into it. It is useless, totally useless.