Arrived promptly, looked like a good quality item, (if not a little on the small side) fitted it into an existing catflap hole with no problems. Was really looking forward to letting my cat come and go as she pleased without the neightbours cat coming in and attacking her.
However, on her first time using it to go out she got stuck in the tunnel! Eventually, realising she couldn't get any further, she squirmed about in the hole and reversed herself back into the kitchen!!!
I too made the mistake of seeing all the 5 star reviews and not paying any attention to the minority 1,2 and 3 stars. Had i read them, i would not have bothered to order this catflap. I don't know if it works well as I never got the chance to try it out.
Do not order this catflap unless you have a very slim/small cat. It would be beneficial if this was stated on the product information to save us all the bother of buying it, fitting it, then returning it. My cat is 12 and has been happily going in and out of a regular catflap since she was old enough to go out. This one is ridiculously small, I am very disappointed.