Very well made, not particle board. Packaged very carefully with each peace protected in the shipping. Hardware and hex screwdriver included with the hardware. Written and picture instructions  included. Also included were stabilization wall mounts to prevent tipping, if needed.  Very stable after assembly. Was able to assemble them (ordered two)  by myself by supporting side panel of bookcase on one of the Styrofoam packaging pieces so the holes would align with the holes in the top piece (first steps of assembly). Shipping was very quick, and within time frame given. Highly recommend this product.