I just put it together and it was very easy to assemble. I love the way it looks and my dogs are comfortable in it. I purchased two extra panels to make it bigger as I have two dogs. I would have given it 5 stars if the door would have been accessible to humans. In order for me to go into the play pen to change the potty pad and feed my dogs I have to disconnect one of the panels. I wish that an entire panel would have been the door.