Unsuitable shape
Be sure to look at the photo more carefully than I did - the first problem with this product, for us, was that it doesn't fit onto the majority of our radiators (the hooks are is too deep). Even on the one radiator that it does hook over in our home, the metal structure means that when the cat lies in it she is at an angle, almost falling out onto the floor - she isn't comfortable so we have got rid of this bed and use a different one instead which she is able to curl up in and relax.