Super easy to put together.  This is built well, but the door is a little too small for the dog to be comfortable in it.   He refuses to go thru the door.   My dog is a small Corgi.  Coming from a normal crate, the dog is use to open area all around and this may be too dark with 3 sides closed.  Nicely made, but not right for my dog.  The box was left out in the rain upon delivery, was drenched and fell apart so I am calling to see if I there is any way I can return it.