Very easy assembly. Clear directions and 6 total pieces.  It came with a crack on the bottom of the base, up front so thats a bummer but Wayfair offered a discount.  My 70 lb pitbull Rosie loves it.  I ordered two large dog beds and covered it with a blanket for her comfort.  She fits with tons of room.  She can turn around in it and stand in it.  As you can see, she can also have visitors with plenty of room.  I cant latch the one side, it just doesnt line up but this isnt for containment but for her rest. Its really beautiful.