This 6 tier bookshelf is light enough to move easily, but the metal rack at the back stabilizes the wooden shelves well. The instruction booklet is one of the best I've ever seen so that I made no mistakes as I followed the clear steps. All the parts were alphabetically labeled, %26 the tools were included, so as a 73 year old woman, I had no problem. It's a unique style, so compact, %26 was on sale for a great price. The LED lights are easy to install, but didn't come with an adapter for the USB, so expect to provide your own. I've only put a few books on it for the picture.