Just had my new Sureflap cat flap with glass connector installed into an UPvC patio door. Jess is absolutely loving the freedom of now having her very own door and I’m delighted to know that she can get in and out as she pleases. The added security that the Sureflap is scanning Jessie’s microchip, allowing only her to enter the house gives comfort that her domestic territory is a safe zone from other neighbourhood cats. Indeed I’m at ease knowing that I won’t come home from work to find a local feline flash mob having a party in my home. Sureflap is the most reliable, high quality and easy to use catflap I’ve found. It looks attractive, is easily wiped clean and Jessie only took a couple of entry and exit runs before she quickly worked out how simple and convenient it is. Love it! Great product, reliable and just purrrfect for outdoor cats and their caring owners.