I cannot comment on how this went together as my husband performed that task.  But I can say that I am pleased with the size and construction.  The special needs kitties are still a part of the family while confined to an area that includes a litter box and scratching post.  We purchased another one as we also have some very elderly cats that have developed bad habits.  All items ordered have arrived very quickly and in good condition.  Thanks, Wayfair!