Great cat flap, very sturdy, SO easy to programme, simply push a wee button, let your pussycat walk through the cat flap, push the button again and ta da, job done! No more stray pussycats in our house! Only took a few minutes for both my boys to figure out the new door, it makes a wee click when they go near, as it unlocks for them (and only them) which made them think twice and sus it out a little longer, but as I said both my cats were happily using it within the first half hour of fitting and we didn't need to use the training mode, although its a handy option to have if you think your cat may take a little more time to get used to it. 100% recommend this! Great price too on this website makes it even better, and delivered super quick too!