This time I purchase one of the returned ones to save n cost.  This one was a bit harder to put together so I can see how it may have been returned.  But never the less is came together and like the other one I purchased new I zip-tied the sides and top shut for a stronger pen.  I foster kittens for my local city animal shelter and I use these to house the kittens at night for sleeping quarters. I purchased extra plush beds so each platform has one.  The kittens love them.  I like it because I can put a litter box, food and water and the kittens can (and do) sleep on the platform beds.