I've got this four-shelf unit in my garage holding paint cans and power tools, and it hasn't wobbled once. The shelves adjust in one-inch increments, so I actually fit my tall compressor on the bottom. The rubber feet keep it from sliding on the concrete too.
Assembled this in about twenty minutes and was surprised how solid it feels once the shelves click into place. I've already repositioned two shelves to fit taller boxes, and the 1-inch adjustment really makes it versatile. The rubber feet keep it steady on my tile floor, so no wobbling when I load i
The chrome coating wipes clean easily, which matters in my garage where everything gets dusty. Only gripe is that the shelves are a bit fiddly to snap into the posts, but once they're set they don't budge.