For the cost, it is a nice piece. I didn't get half the screws that should come with it, but I had some around that worked. Some of the plastic end caps that go on the ends of the shelves were broken or destroyed during shipping. But it still works.

I bought two sets of these in mid March 2021. They solve the problem they were designed to solve. In my case, they create temporary storage for long dimensional lumber materials, and for woodcrafting I enjoy between DIY renovation projects. You can see from the photos that it holds 12' 2x6" and various other items including one of my ladders, a roof rack, longer tools (my 6" level, drywall T-square) etc.
Without weight calculations, I estimate this assembly can hold 6 16' 2x6" boards per each horizontal level. Each horizontal level defined in this assembly by four leveled orange horizontal metal bars (two kits).
Actual measurements of the components inside the package are provided in the photos for your reference. I find these measurements useful when planning the installation and making my Sketchup. The plastic spacer disks that your mounting screws (not included) will pass through create a 1/2" space between the gray vertical support and the wall (photo included).
The plastic spacers and slide-on horizontal (orange) components seemed weak coming out of the packaging, but they get the job done fine. I was able to hang from each of these orange supports (I am 6'2" and 200 lbs) without any hint they might fail. Translated, that means I deliberately exceeded the stated weight limit of each horizontal member in this case by about 90 lbs. No problems.
I mounted the ones you see in the picture 35 1/4"" from the left perpendicular wall, 33 1/4" from the ceiling, and 32" on center between each vertical support. I used Spax 4581820700765 1/4 x 3" T-Star Drive Washer Head HCR (Exterior) Powerlag Screws (not included).
Essentially, I mounted each assembly to a vertical wall stud, skipped a stud, then mounted the second assembly and so on - making sure each one was level and plumb. You can see the Sketchup I did to show how they are attached to the walls (ignore the shelving units I have not built yet above them). These walls are 11' tall.

While I am generally happy with what these do and how they are doing the job, I have a negative:

One orange horizontal member in each kit seems to be defective. Since I had one defective orange component in each box, I thought maybe I had missed something in the instructions and the defects were intentional. But each of the defects in each are slightly different. In both cases, the lip portion of the underside of the member are shorter than the rest (see photos). In one defective component, the top of the square through-cut is also cut more distal to the vertical (gray) member than the others. The net effect of these two defects (one per kit) is that one of the top-most orange horizontal components angles up at an unnatural angle (see photo second vertical assembly from the left). in the second defect, the top-most orange horizontal component slides down over the support screw (see photo third vertical assembly from the left).
I chose in this case to mount the two defective orange horizontal components at the very top of the assemblies with the hope that I can find a way to contact the manufacturer and get replacements. Since these orange horizontal members simply slide over the top of the gray vertical support bar and rest on the support screws, I should be able to replace these two defective members without having to disassemble anything more.
Contacting the manufacturer with the specifics of my case doesn't seem to be an easy thing to do. I don't see a need to return the entire units since they are both mounted and functional. Just getting replacement parts is an adventure I'm still working through.
Depending on how the manufacturer responds, I'd likely buy these again if I need more space for wood. The concept is sound. The execution is a little sloppy.

4/6/21 Update: After talking with Amazon customer service, they have agreed to send me a single replacement package. I will take two parts from the new package (presumably not defective) and return the rest. This solution seems a little expensive for them and slightly inconvenient, but it probably works better from their perspective than breaking open a box and sending me replacement parts I need.
In the end, Amazon is honoring their end of the deal to get me two fully functional units, so I'm going to add a star (from 3 to 4), and simply accept the gift that life isn't always fair, perfect or clean. The best we can do is trust that, despite imperfections, we will each do our best in the end. Well done.

I was disappointed in the quality of this lumber rack. It is made of thin wall metal tubing. But it seems to be sturdy enough to hold a reasonalble weight. The arms for the rack have no hard conneciton to the uprights bolted to the wall. They just slip over the upright tubes screwed to the wall and are held at even levels by a tiny screw (not screwed to the arm, just a tiny screw in the upright that serves as a stop for the arm. The arms just slide down til they hit the screw.) I haven't loaded them up yet, so i'll just hope they hold what they are supposed to and last for a while. BTW, no lag screws were included, so plan on a run to the hardware store for screws and washers to put it on the wall.

I have bought this Bora set numerous times and have many of them in my garage. While they are fantastic if you get a defect free set, I have found that some of the sets I have purchased have brackets that are seemingly impossible to level. They simply will not sit right on the screw. I have tried shims and other approaches to try to correct, but often it seems like the best approach is to return the set to where you bought it and grab a different set. The majority of the time the replacement works. I would echo some of the other reviewers that indicate issues with screws, not threading correctly. That has happened to me in the past. I think Bora knows this as well because they ship extra screws in each set. I would still give them a a rating of three or four stars because they work very well when you get a good set. I have also modified some of my sets by adding an eye bolts to the end of the brackets and use steel rope threaded through them to ensure no wood falls on some of those shelves that have more janky pieces piled on them.

Found myself getting buried in my variety of on hand hardwoods. A little shop clean up and reorganization freed up some perfect wall space to install these. Now I have a shelf for my maple, walnut, black locust, and misc.