The perch up top has become my cat's favorite nap spot, and she actually uses the scratching surface instead of my couch now. Mounting took maybe twenty minutes and they feel rock solid even with her jumping between them.
John★★★★★
My two cats basically live on these now — the top shelf has become the main lounging spot and they race up there every morning. I like that the shelves double as decor instead of looking like bulky cat furniture stuck to the wall.
Hazel★★★★★
The scratching surface on these shelves has held up way better than the sisal post I had before, and my cat actually uses it instead of the couch now. Mounting took me about an hour with a drill, but the perches feel rock solid once they're up.