The wood shelves are beautiful in person and the metal bar design is quite nice.  However, sliding metal parts "A" and "B" together took some maneuvering and once together they were very wobbly.  The worst part about the installation was using screws "G" into the small holes of the metal sides.  The screws could not be placed all the way inside the metal sides and they were mainly jutting out. Stability was a major concern.  I was concerned that i was given the wrong screws for the job.  If the metal sides had a rigid inside for the screws to be screwed into, then the whole installation would have been easy.