Bookshelf made of particle board with a dark grain veneer, arrived quickly and well packaged. All pieces cut evenly and cleanly, fit together snugly without being loose or too tight in any places. The directions were very clear and I was able to assemble using a small hammer and phillips head screw driver.I was worried about stability based on the fact the the panels are particle board, but that turned out to be a non-issue. Once the frame was installed, there was only a small amount of side-to-side movement, and when the shelves and back were attached, this movement was reduced to basically nothing. I considered not using the backing, since it's basically just laminated cardboard that is folded into thirds before being unfolded and tacked onto the back, but I'm glad I went through with using it because it donates a surprising amount of stability. Was able to lift the shelf and move it around the room a good bit before loading it with books and it didn't wiggle or suffer at all from being moved around. The assembly comes with a metal piece and some screws for securing it to the wall if you want, but I just wadded up some newspaper and put it under the front corners to lean it against the wall slightly.The shelves have adjustable spacing and there was plenty of height on the bottom shelf for binders and textbooks. They fit snugly into the frame, and sit on clear plastic supports. I wouldn't suggest weighing the two upper shelves down with heavy textbooks for this reason, but some replacement metal supports would probably be pretty easy to acquire. The bottom shelf is securely supported with 4 screws, 4 plastic pegs, and the wooden panel along the bottom, so pretty safe for heavy books. I expect the particle board will start to sag after a while, but that's a pretty reasonable expectation knowing what the material is and the price and all. It should still have a pretty good lifespan, no expectation that anything will split or break.The overall appearance is very professional, clean cut, no exposed wood, and the veneer is a nice dark shade with an even subtle grain.In conclusion, I was very pleased with the product. It arrived in a timely fashion, well wrapped and packaged, and was easy to assemble with a minimum of tools. It was very secure and stable once assembled and is now fully loaded with books. It looks very clean and professional with no exposed edges.