Having bought four of these sets of racking, there is considerable variation in the quality of the supply. The racks themselves are easy enough to use, and are unquestionably strong enough to carry the weight capacities, clipping together with "keyholes" cut into the uprights and pre-fitted rivets that have been pinned through the crossmembers. Some of the rivet heads need tapping into position within the cross members in order to achieve a fit, and a rubber mallet is essential for banging all of the parts together, but the finished article is smart and sturdy.
The only criticism is that of the four sets that I've bought, three had been opened before, and one was delivered in a Radley Handbags box, with some parts missing. This is not what I consider "Brand New".
In summary, excellent product, expect to do some easy hammering to get it assembled, but check the contents of the box as soon as it arrives - if the box has been opened or parts are missing, don't be afraid to make noises to the supplier. It's the only way they will learn how to meet their customers expectations.