Bought this to keep my 4 month old kitten downstairs while we sleep at night.  She can still squeeze in through one of the slats, but we use a piece of cardboard.  Super tall so she can't jump over and I love the door so we can get through easily.  Was super easy to set up and easy to use.  Shipped super fast - had it the day after it shipped.  Inexpensive and great product.