The quality of this bookshelf is solid for engineered wood, and it wasn't too difficult to put together with one person. I'm only giving it three stars because the photo and description claim that it can be used vertically as well as horizontally. My daughter wanted it vertical (as shown in the photo), but there are four round-headed screws that go in each of those sides (both top and bottom), so it is not visually appealing and will scratch your floors with the screws on the floors. Luckily I have a large screw collection and switched them out for flat-headed screws, sank them in slightly below the surface and used wood fill to cover the top of the screw. It could have been made so much easier if the manufacturer made it that way, it would be such a simple fix. Unless you want to do the extra work, assume that the shelf will be used horizontally. In the end, it's a decent bookshelf other than that issue.