It seems quite sturdy for being made of plastic, and according to the specifications, it can hold up to 25 kilograms on each shelf, which is great for most items in a household. However, personally, because it is tall and lightweight, I don't trust loading it with a heavy weight on the top shelves because I'm afraid it will easily fall if I don't use wall supports.
It is very easy and quick to assemble, as it consists only of the shelves and the tubes that fit into the holes of the shelves to support them.
Unfortunately, it doesn't have separate legs for the base, so the bottom shelf inevitably rests on the floor with its four edges, which are like low "legs". I have also bought a plastic shelving unit from a different brand (specifically the Q-black from the Scroutz), with a price difference of 3 euros, which, however, had legs of at least five points to avoid touching the floor, and additionally had supports to lean against the wall, and these two shortcomings were the only things I didn't like. However, for 21 euros, it still remains a decent purchase.