This is an Amazon review for 'corner book shelf black' with some notable issues mentioned:

1. The main reason for purchasing was availability due to the rare option of glass door fronts.

2. Despite this, there are still problems:

- Some mm of sagging shows on the shelves.

- Shelves that were supposed to be flat (5mm) have not returned to their original level after assembly.

To fix these issues, additional support was required:

a. Two vertical strips of wood had to be attached to the back of each bookcase for added stability.

b. The shelves had to be fixed directly onto these wooden supports using plastic corner blocks because they were too thin and made from chipboard.

3. Furthermore, there is another significant issue with the product:

- The shelves are not thick enough to support a full row of books; instead, they will start sagging alarmingly in the middle by about 5mm.

This means that without customising them further (e.g., adding additional supporting material between each shelf), these bookcases cannot properly function as intended for their intended purpose.

4. In conclusion, based on this reviewer's experience with four purchased units of 'corner bookshelf black,' they would not recommend purchasing this item in its current form due to the numerous structural weaknesses mentioned above.

Corner book shelf black