I already had one of these gates but needed another.  I've got cats and dogs; unfortunately the dogs like to eat cat poo, so I can't let them into the rooms with litter boxes.  These gates keep the dogs out.  I used to keep the little door open for the cats, but I now have a little dog, too, so my cats jump the gates instead.  These gates are very versatile, and it's wonderful that they come with an extension so I can use them in the halls instead of just doors if I prefer.