Amazingly sturdy shelves for an incredible price. The load bearing rating appears to be true. I can hang off them and they now hold much more than my weight. 

They are nice and tall. I was able to assemble them with custom shelf heights. 4 stars only because the first assembly instruction is that you should have two or more people. I'm sure that would've been easier. It is tab assembly, which is to be expected at this price point. But, it's also entirely possible to build solo, as I did, with a bit of extra effort and time. The only assembly tools needed are a rubber mallet and a flat screwdriver. Gloves and extra pieces for alternate designs are included.

Overall, great purchase and I will buy more.