These are very cute and look great in our daughter's room. The instructions were a bit hard to follow, since we couldn't tell if we were supposed to pre-drill holes for the anchors or not, but we did so anyhow.  The pictures also appear as if the screw needs to go in at the same time as the anchors, but we've always done anchors first, then the screws. So, we did the anchors, but when we went to put in the screws, the anchors went right through the wall.  Thus, we used just the screws (without pre-drilling holes) and the shelves are holding up just fine. Make sure you measure exactly the space between the 2 holes for the screws, otherwise, it's really difficult to get the screw fit into the holes when mounting, since the holes for the screws are basically the size of the screw head, so any measurement off means the screw won't match to the whole exactly.  Also, make sure the screw is almost entirely in the wall, otherwise you'll have space between the wall and the shelf.