Using it and a couple of the extensions for a 64" kitchen opening--holds firm with the pressure mounts. 

If you have a Houdini like our 11-yo giant-sized Airedale though, they might figure out how to open it by themselves after watching you a couple of weeks. He's not knocking it down, he's actually opening the human-door in it. 

So far he's not let the puppy into the living room though & that was our intention of buying the gate in the first place--keeping the puppy in a more isolated area that could easily be puppy-proofed. 

Overall, great product!