I was a bit upset when I had opened the box and I had little white beads fall out and scatter all across my hard wood floors and under my furniture.  The little white packs had broke open. I had to hurry and grab my 2 cats and put them in another room and sweep them all up so they would not eat them.  My cats however, are enjoying the tower.

Pros: The many levels allows both cats on with out fighting
Cons: The location of many of the posts make it difficult for the cats to move from level to level as they are centered at the end of the shelves which does not leave a lot of room