I was amazed at how easy the assembly was. I was dreading having to put it together....it was a piece of cake....and ALL THE PARTS WERE THERE. This is something I had experienced with another company, you order something and some parts were missing..what a hassel that was....The cats love the Cat Tree. Cats love to be up high and this gives them that experience. I have twin tiger cats that are three years old...I will order again from you....Merry Christmas from Rose and Lily.....