My staff found it easy to purchase, and easy to instal, they grumbled about the intricacies of setting up the electric control settings, but they are old and stupid and I have to make allowances for them. I had no difficulties making use of the Cat Flap, and was out through it before you could say "Rabbit". I do have my criticisms, I now require a wrist watch so that I know when the doors are open, and its difficult to enter carrying a rabbit to present to my staff, (they do so look forward to receiving half eaten carcases on their carpets.) On balance I can write with confidence that every cat should have a Flap. By later today I had mastered the difficulty of getting a rabbit through the Flap, and can now declare myself completely satisfied. Prrrrrr.