Alone the construction is a bit tricky, especially the orientation of the bars between the floor and ceiling, but it can be done. Everything really is a breeze after that. The manual is clear and I had no trouble to set up the shelf as I wanted it. Due to the previous reviews, I wanted to try to fix the cross bars without locking screws, but then they under stress not enough grip.
The shelf is now for about a week, now and then it cracks times, but it is to be stable, despite decent load.