The overall end result looks nice. The only main problem is one of the slate that attached the headboard and the wooden frame: It's missing a hole + another hole is also not well aligned with the opposite hole. it gives the result below. Just the time to finish to assemble the bed and it has already created a pressure on the wall.  The bed might not be as sturdy. I would need another slate.
Laslty, I took at least 3hours to assemble the bed because of the headboard. I tried different configuration of the slates (turning, switching, etc.).