Give yourself at least an hour to assemble and install. But worth it! They look almost identical to the advertisement, except you notice the gaps in between the wood while you assemble the product, and it totally throws you off on how to put it all together. Some of my screw holes did not line up for the mirror pattern and needed some tork or bending re drilling of the screw-to-hole placement. Note the weight of the shelf when all put together - will need to hit a stud in the wall! For safety of your cat, please find a stud.