Just upfront, my comments and ratings are heavily considering the price, which was 30% less than other similar options I saw. The biggest complaint/issue for me was the packing. It came with the corner of the top cover/shelf bent up about an inch or so. I was able to hammer it flat enough to hardly notice, unless you know what you are looking for. Comes with concrete expansion bolts to wall mount, also includes the casters all with brakes. Came with 16 standard rack clip mounts and bolts that use an allen wrench (included). Not familiar enough to compare quality but 1 clip did brake after a couple add/removes. The 12 Us are labeled both front and rear side, which is nice. The 2 trays that come with it, I assume would cover most random uses, I only needed 1 of them. Having 2 though gives options (imo). I put a small battery backup on the larger shelf which did sag a little, these are heavy so not surprised. It seems sturdy enough. Nothing seems overly cheap or flimsy. Assembly is pretty straight forward, the instructions aren't great, but they aren't the worst I have seen. I did end up having to reverse some parts, some of the side bar orientation wasn't really clear in the image, but they did specifically try to call out certain features like the caster holes for proper orientation (though the same parts have the U labeled so difficult to put upside down anyways. The adjustability is a nice feature if needed (I didn't), so cannot comment of sturdiness if fully expanded. Those particular bars came pre-assembled in the shortest configuration which was nice. The instructions did include steps to put them together as if they weren't.
Daniel D Dirksen 
Roland 
