Update worth every penny! Our cats LOVE their shelves. My photos have both the small Leaf shelf and the Branch shelf because we put them side by side. It has been two years, and the cats are not bored, but use them daily.

Original review I got these ages ago, and then was too afraid to mount them. But we finally hired a guy who manages the hardware section at the local building supply store, and he mounted both shelves today! Levon the Brave is trying them out and I know all three cats will love these! The guy found the studs for this small one, but said the drywall is so thick that he did not use the studs for the long Lotus Leaf shelf. But I would not have done this on my own. 
Since we a have hardwood floor, we did not want either shelf very high, because both younger cats will jump straight down. Their joints need to be protected since they are 5 years old. But I am super happy.