It took my fiancee a few hours to put the tree together.  Now...to get our cat to know that it was hers.  We rubbed catnip on it and encouraged her to get on it, climb around and play with the toys.  It took her a few days, but now she is the queen of the high tower.  She loves the tall bed, and to sprawl on the third shelf.  She is a regular sized 10 lb cat and has room for all of her.  Great product!