My son wanted to display some of his Star Wars Lego builds in the living room so...I purchased four 15.8 x 5.5 acrylic shelves and used two mounting squares for each shelf (wall is concrete). The first evening, two of the shelves came crashing down, one of the coffee table, bye bye Darth Vader Meditation Chamber and the other had soft landing on the sofa. The next day, the other two EMPTY shelves fell down. Also, we are renters so I don't want a bunch of screw holes in the walls.
Rating: [4 of 5 Stars!]