Recently moved house with my Ragdoll(TIFFANY !! ) ... Fitted a regular 4 way lock catflap same as old house .... Over the next few weeks Tiff became really nervous in the house , urinating outside her litter tray , over grooming ...all the signs of stress .... Vet thought the street bully( black and white cat !) that had been hassling Tiff was actually coming in the house so the decision was made to buy a microchip cat flap ... I searched the web and read every review going... I settled on a PetSafe catflap .... Delivered quickly ... Fitted easily ... Delighted with all the different modes, especially the night mode dusk till dawn !!! Tiff took just a day and a half to get used to it and is now so much happier at home ... The indoor soiling has stopped and the over grooming subsided!! Happy Cat ... Happy Mammy !!! If ur looking for a great product at a great price then this is for you !!!! 10 out of 10 !!!!