It took me a little while to figure out how to put it together and get it to stay securely in the door; but, once I did, it worked as expected.  The human gate within the barrier is a little awkward to use, but it wasn't bad once we got used to it.  We used the pet gate in the doorway to our guest bedroom when we had an overnight guest with a visiting dog.  We have cats who didn't appreciate the doggy guest, but the human guests wanted the bedroom door open at night for air and heat (we have a pellet stove in the living room that heats the whole house). It solved the problem nicely, and it was easy to take down and put away when the guests left.