Although assembly instructions are included, it is a bit challenging to put together as the four base holes are not matched to the numbered posts. Otherwise, I am very pleased with this cat tree.  My two cats explored it tentatively, and I am sure they will eventually like it as much as their older cat tree.  They prefer to scratch on sisal rope, and especially like to stretch full-length while doing so. They already have a stand alone box of holes, so I know they will be intrigued with the eye-level one on this model.  I would definitely recommend this cat tree to pet owners.