Very solid and impressive looking bookcase. We have been looking for a nice bookcase but most have been rated at 25lbs or less. This one is rated at 45lbs and 50lbs on the bottom shelf. It as levelers on the bottom so you can adjust for uneven floors, big plus. Very simple to put together and excellent craftsmanship. It uses allen head machine screws to fasten pieces together which are pre set with metal fasteners already secured in the receiving holes. It looks fabulous when done. My only suggestion is to connect the side panels together in step one upside down than what the instructions show if you are putting it together alone. The sides will balance by themselves and you want be trying to imitate a circus act to secure the cross shelf.