These bookcases came quite poorly finished - the grooves on the post pieces weren't wide enough for the shelf edges, and were very splintered. We had to use a mouse sander to sand off the edges of the shelves so that they would go into the grooves, and used a power drill to put the screws in as this was too difficult to do by hand. The wood is very basic, which I had expected to some extent, but also chipped easily when moving the pieces around to fix them together. Because of the flaw in the grooves, these took way longer to put together than we would normally need for flatpack furniture. The pieces for securing the shelves to a wall at the top were just a piece of cotton ribbon, a washer and one screw for each bookcase - we couldn't make out from the very basic instruction picture how this was supposed to work, so didn't bother with it. Instructions were just a sheet with a picture of the pieces as they should be laid out - some guidance on how best to make them straight would have been helpful, in the end we used trial and error. They were ok in the end, but not worth the price charged. Wayfair did give a partial refund for the flaw and getting that was quite easy - customer service and delivery was fine. Now they're put together the shelves are reasonably sturdy but lightweight, which made putting them in place easy.