I will begin with what this is, and what this is not.
This is a fiberboard-based solution that supplies inexpensive, flexible, media storage, while looking reasonably nice. In all honesty, this specific model of Atlantic Oskar is the lowest price, quality solution I have found per storage unit. These have held-up well through 4 moves. With reasonably quick disassembly, they hold-up even better. The hole locations aren't perfect, mostly due to the nature of fiberboard. The use of a T-square and some smart use of the screws, makes the final product look quite good. The first will always take some time (~2-hours plus or minus). This will drop to under an hour with experience.
I, currently, have six that I have purchased over a few years, to say I am pleased. There are a few caveats. I recommend completing the top section, first, including nailing the back-board on. This allows for a flat surface for your nailing, making life a bit easier. From there, add the bottom section. When face-down, it will lie at an angle, due to the larger bottom for stability. Before nailing the remaining backboard, use a few shelves to brace the structure. This will prevent damage, and make your life easier.
That all said, this is not Ethan Allen, nor does it share the price. It may not quite have the visual appear or fitment of products associated with premium discount retailers, but my experience is that these hold-up better.